1. So, even under normal situations, the gene flow among the subpopulations is more of an
intermittent trickle than a steady stream.
所以即使在正常条件下，这些亚物种间的基因流动也更像是一条断断续续的细流，而不是一条不停流淌的小溪。
2. When the driver accelerated, the vacuum was insufficient to run the
intermittent mode and the wipers would default to high speed.
当司机加速时，真空不足以运行间歇模式，雨刷将默认为高速。
3. Actual loss will depend upon the particular frequencies to which one is exposed, and whether the sound is continuous or
intermittent.
实际的损失将取决于暴露的特定频率，以及声音是连续的还是间歇的。
4. After three hours of
intermittent rain, the game was abandoned.
雨断断续续地下了3个小时之后，比赛被取消了。
Kou Nannan, head of China Research at BloombergNEF, said most new energy sources are intermittent with rapid and random variables, making it difficult to maintain stable and steady power generation, thus posing a threat to steady grid operation.
BloombergNEF中国研究负责人寇楠楠表示，大多数新能源都是间歇性的，具有快速和随机的变量，很难保持发电的稳定和稳定，从而对电网的稳定运行构成威胁。
While power supplies have been assured, a gradual increase in the proportion of renewable energy sources in the power system poses challenges to stability, experts said, adding that their intermittent nature and lack of flexibility need to be addressed.
专家表示，虽然电力供应已经得到保证，但可再生能源在电力系统中的比例逐渐增加，对稳定性构成了挑战，并补充说，需要解决其间歇性和缺乏灵活性的问题。
Stable operation of the grid plays a key role in dealing with the fluctuating output of intermittent energy sources, he said.
他说，电网的稳定运行在应对间歇性能源输出的波动方面发挥着关键作用。
Chris Rudd, deputy vice-chancellor and head of the Singapore campus of Australia's James Cook University, said: "It is widely accepted that decarbonizing utility supplies in the UK is more urgent than ever before and that intermittent green energy sources such as wind, tide and solar are the only realistic future.
澳大利亚詹姆斯·库克大学副校长兼新加坡校区负责人克里斯·拉德表示：“人们普遍认为，英国的公用事业供应脱碳比以往任何时候都更加紧迫，风能、潮汐能和太阳能等间歇性绿色能源是唯一现实的未来。
While China has been actively developing cleaner alternatives like wind, solar and hydropower on a large scale, coal-fired power remains irreplaceable as renewable power like wind and solar is intermittent and not able to continuously generate power.
尽管中国一直在积极大规模开发风能、太阳能和水电等更清洁的替代品，但燃煤发电仍然是不可替代的，因为风能和太阳能等可再生能源是间歇性的，无法持续发电。
The intermittent nature of most renewable energy requires energy storage, the cost of which can negatively affect the return on renewable generation investment, he said.
他说，大多数可再生能源的间歇性需要储能，其成本可能会对可再生能源发电投资的回报产生负面影响。
The Fengning pumped storage facility will operate as a peaking power plant for the safe and stable operation of the Beijing-Tianjin-North Hebei grid while balancing intermittent power supply from large wind and solar parks in northern Hebei and Inner Mongolia, it said.
丰宁抽水蓄能设施将作为调峰发电厂运行，以确保京津冀电网的安全稳定运行，同时平衡河北北部和内蒙古大型风能和太阳能园区的间歇性电力供应。
Ding Rijia, a professor specializing in energy economies at the China University of Mining and Technology in Beijing, said that renewable energy sources such as solar and wind are intermittent and volatile.
北京中国矿业大学能源经济专业教授丁日佳表示，太阳能和风能等可再生能源具有间歇性和波动性。
The companies are likely to increase such capacity because it is critical for grid balance given the massive amounts of additional intermittent power generation, including solar and wind, being commissioned, said Joseph Jacobelli, a senior analyst of Asian utilities at Bloomberg Intelligence.
Especially at nightfall, the ancient city of Nanjing, with a history of around 2,500 years, unveils its remarkable splendor as the intermittent sound of paddling boats mingles with the serene river, casting dancing lamp shadows that create captivating concentric circles of gentle illumination.
"The evolving supply-demand dynamic is making power system operations more complex, with issues arising from intermittent new energy sources, insufficient system flexibility, and heightened difficulties in load control.
Luo Zuoxian, head of intelligence and research at the Sinopec Economics and Development Research Institute, said massive amounts of flexible electricity supplies will become increasingly important for the grid as renewable power capacity in China continues to grow and the stable operation of the grid plays a key role in dealing with the fluctuating output of intermittent energy sources.
Renewable energy sources including solar and wind are intermittent and volatile and the new types of power storage will play an increasingly important role to realize the transition to a new type of power system with new energy as the main body, said He Gang, a professor at Xi'an Jiaotong University.
To address the intermittent problem of renewable energy, the document said the country will work out medium- and long-term planning for developing pumped storage and improve the policy mechanisms to boost their development.
Global consultancy Accenture said in a report that hydropower's ability to rapidly adjust output levels and respond in time to peak demand periods ensures consistent and reliable power supplies, thus contributing to the overall stability of China's power grid, preventing shortages and supporting the integration of intermittent renewable sources.
Kou Nannan, head of China Research at BloombergNEF, said that most sources of new energy are intermittent and have rapid and random variables, making it difficult to maintain stable and steady power generation and posing a threat to the steady operation of the power grid.
The move is to ensure energy security through more flexible coal supplies at peak times of power use, in the context of a significant increase in grid-connected renewable energy that is characterized by its intermittent nature, experts said.
The increasing share of wind and solar energy and their intermittent nature pose difficulties in real-time balance during extreme weather conditions, she said.
They play a critical role in reducing the power industry's dependence on fossil fuels and ensuring energy supply when more power is generated from intermittent wind and solar sources.
While coal will continue to play a crucial role in the short to medium term in China as green power grows, it is as essential to come up with a safer and more stable operation of the power system amid the country's green development push, as most new energies are intermittent with rapid and random variables, making it difficult to maintain stable and steady power generation, it said.
Differing from fossil fuels, new energy power generation requires a safer and more stable operation of the power system, as most new energies are intermittent with rapid and random variables, making it difficult to maintain stable and steady power generation.
An analyst said that nuclear power is a more stable and reliable type of clean energy compared with solar and wind power, which are more intermittent due to changing weather conditions.
"As an 'energy transporter' and 'stabilizer' for new energy sources, energy storage can make up for the intermittent and fluctuating characteristics of new energy sources, solving issues related to the high proportion of nonfossil energy sources and the large-scale integration into new power systems," he said during the new energy storage industry high-quality development forum held in Taiyuan, Shanxi province, on Thursday.
He said the intermittent, fluctuating or unstable nature of new energy sources also poses challenges to oil and gas extraction.
As massive electricity is difficult to store in other ways, the stations help ensure safe and stable operation of the power system, especially after a large batch of intermittent, unstable new energies are used for power generation, experts said.
These measures, Liu said, have helped mitigate the intermittent, random and fluctuating nature of new energy sources and strengthened their role in ensuring stable power supply.
"The power generation of renewable energy, such as wind and solar, can be intermittent due to natural variations and that's where the opportunities stand for new energy storage," said Lin Boqiang, head of the China Institute for Studies in Energy Policy at Xiamen University.
That is because most new energies are intermittent resources, which undergo sudden or random fluctuations.
That's because most new energies are intermittent resources, which undergo sudden and random fluctuations.
The problem with these modalities is that they are intermittent and not always available when needed.
That's because most new energies are intermittent resources, which have rapid and random changes.
That last type of storage allows energy from intermittent sources, such as solar and wind, or excess electricity from more renewable sources to be stored for periods of higher demand.
How to transform intermittent wind power and photovoltaics into stable power sources will be a major issue to ensure energy security," said Lin Boqiang, head of the China Institute for Studies in Energy Policy at Xiamen University.
Li said the company is planning to step up its capacity of large-scale water electrolysis equipment for hydrogen production in China, while investing more in the research of hydrogen production using photovoltaic intermittent green electricity.
Speaking at an energy forum held by the China Renewable Energy Engineering Institute, or CREEI, they said as the country ramps up the development of intermittent new energies and strives to increase their weight in the power-generation system, developing pumped-storage hydroelectricity projects can help maintain stable grid operations and, therefore, promote the construction of the new power system.
"As renewable power capacity in China continues to grow, a huge amount of flexible electricity supplies will become increasingly important for the grid, to deal with the fluctuating output of intermittent energy sources and to keep operations stable.
How to transform intermittent wind power and photovoltaics into stable power sources will be a major issue to ensure energy security.
"Different from fossil fuels, new energy power generation poses higher requirements for the safe and stable operation of the power system because most new energies are intermittent resources, which experience rapid and random changes that make it hard for stable and steady power generation, causing volatility in voltage and frequency disturbances in grid operation.
"Different from fossil fuels, new energy power generators pose higher requirements for the safe and stable operation of the power system because most new energies are intermittent resources, which have rapid and random changes that make it hard for stable and steady power generation, and also cause volatility in voltage and frequency disturbances in grid operation.
Coal-fired power will still play a crucial and irreplaceable role in the stability and consistency of a new power system dominated by new energy, as renewable power such as wind and solar is intermittent and unable to continuously generate power, analysts said.
Nation responds to intermittent energy output issues with more storage capacityChina is scaling up pumped-storage hydroelectricity capacity in a bid to maintain stable grid operations as the country ramps up the development of intermittent new energies.
"The rollout of massive new energy projects in desert areas helps boost the development of pumped-storage hydroelectricity and battery energy storage systems to abate the fluctuating output from intermittent energy sources like solar and wind, and also helps provide better energy storage modalities," Lin said.
Thus, intermittent smoothing approaches are important," said Yi Yuechun, deputy director-general of the China Renewable Energy Engineering Institute.
Yi Yuechun, deputy director-general of the institute, said PSH can abate the fluctuating output of intermittent energy sources like solar and wind power as well as provide energy reservations, making it essential to new energy development as China transitions to a greener economy.
Yi Yuechun, deputy director-general of the institute, said pumped storage hydropower can abate the fluctuating output of intermittent energy sources like solar and wind power as well as provide energy reservation, making it essential to new energy's development as China is transitioning to a greener economy.
On the other hand, as Guangdong has also been stepping up offshore wind power development in recent years, it will be more challenging for the local power grid network to absorb all the green but intermittent power.
Connecting the flexible direct current back-to-back project of different regional power grids will further ensure a steady operation of the power network in Guangdong, especially when its power network now faces complex intermittent power flows caused by the transition from fossil-based fuels to zero-carbon resources, it said.
China Southern Grid, one of the country's two major power grids, has been stepping up the construction of smart grids in recent years, as aging infrastructure and complex intermittent power flows are making the need to modernize power grids more critical.
While the intermittent nature of new energy has long been a factor hindering its use on a large scale, the construction of a major power network is considered one of the solutions to this problem.
While the country is stepping up development of renewable energy, hydrogen could help cope with the intermittent nature of renewables, as the excessive supplies of renewable power can be used for electrolysis to produce green hydrogen, which can be utilized later to generate electricity, said Ivy Yin, energy transition analyst at S&P Global Platts.
However, power supply with such energies is intermittent and difficult to be managed in accordance with the power supply.
"To this end, power storage is becoming more prominent in China's transition to green energy as it helps provide uninterrupted power supply and maintain efficient power flow when using intermittent new energies for power generation," said Lin.
Compared with new energy, gas is able to provide uninterrupted energy supply as wind and solar power is intermittent, and hydrogen or other sources have less advanced technology development.
"Renewable energy sources including solar and wind are intermittent and volatile," said He Gang, a professor at Xi'an Jiaotong University, noting the grid will see mounting pressure as electricity is used in a continuous manner.
"Renewable energy sources including solar and wind are intermittent and volatile," said He Gang, a professor at the Xi'an Jiaotong University (XJTU), noting that the grid will see mounting pressure as electricity is used in a continuous manner.
He added that inefficient coal power plants may be forced out of the market in a shorter time frame than expected, and the process of transition toward the 2030 carbon peak goal will also place downward pressure on coal from power market prices due to intermittent renewables that will increasingly dominate the system.
It will have to face downward pressure from power market price, and almost at the same time, increasingly serve the intermittent renewables that will dominate the dispatching system.
"Unlike traditional large central power plants, intermittent power generation from unpredictable wind speeds and sunshine poses serious concerns regarding power reliability.
"Factors like the random, volatile and intermittent characteristics of new energy power generation, the small scale of electricity consumption and insufficient peak shaving capacity still pose big challenges to Gansu's new energy consumption," said Chen Zhenhuan, director of the dispatching center of State Grid Gansu Electric Power Co.
"Hydrogen as an energy storage system is flexible in terms of scale, location and timing," said Li, adding its complements intermittent, as well as seasonal, renewable energy sources, such as hydro, solar, wind and biomass.
The smart grid sector is on a development fast track buoyed by the need for a stable and reliable power supply, as an increasing amount of power is generated from intermittent renewable energy sources, experts said.
The smart grid sector is on a fast track of development buoyed by the needs of stable and reliable power supply, as an increasing amount of power is generated from intermittent renewable energy sources, experts said.
Nuclear power is a more stable and reliable type of clean energy compared with solar and wind power, which can be intermittent due to changing weather conditions, said Lin Boqiang, head of the China Institute for Studies in Energy Policy at Xiamen University.
However, as the focus of power generation gradually shifted toward renewable energy resources, such as solar and wind, problems emerged as these modalities are intermittent and not always available when needed, making it extremely difficult to manage power supply.