DC, or Direct Current, flows in a single direction without reversing."
DC，即直流电，电流在一个方向上流动，不会反转。
The electric motor in my car runs on
DC power from the battery.
我车上的电动机由电池提供的直流电驱动。
A solar panel converts sunlight into direct current electricity.
太阳能板将阳光转化为直流电。
In a circuit, AC and
DC can coexist, but they are often separated for efficiency.
在电路中，交流电和直流电可以共存，但为了效率通常会分开处理。
Batteries are typically used to store
DC power for portable devices.
电池通常用于为便携式设备储存直流电。
DC voltage is safer than alternating current (AC) when handling electronic components.
直流电压在处理电子元件时比交流电更安全。
The voltage regulator in a computer adjusts the
DC output to maintain a stable system.
计算机中的稳压器调整直流输出以保持系统稳定。
DC trains are popular in some cities for their quiet operation and reduced maintenance requirements.
直流火车在某些城市受欢迎，因其运行安静且维护需求较低。
Electricians use
DC testing tools to diagnose problems with electrical systems.
电工使用直流测试工具来诊断电气系统的故障。
A common method of converting AC to
DC is through the use of a rectifier.
将交流电转换为直流电的一种常见方法是使用整流器。
This has resulted in a total UHV DC transmission capacity of 130 million kW, laying a solid foundation for the establishment of a power network in East, North and central China, and helping ensure a secure and reliable power supply that supports the nation's transition in energy structure.
这使得特高压直流输电总容量达到1.3亿千瓦，为建立华东、华北和华中电网奠定了坚实的基础，并有助于确保安全可靠的电力供应，支持国家能源结构的转型。
According to CRRC Qingdao Sifang, the new trains will be powered by a 1500V DC overhead conductor rail system, which will increase energy efficiency over a typical 750V DC third rail system.
据中车青岛四方介绍，新列车将由1500V直流架空接触轨系统供电，这将比典型的750V直流第三轨系统提高能源效率。
State Grid said this is also the first time that a pumped-storage hydroelectric power plant was connected to a flexible DC network.
国家电网表示，这也是抽水蓄能水电站首次接入灵活的直流电网。
US District Judge Carl Nichols in Washington, DC, made the decision hours before the ban would take effect after Sunday midnight.
美国地区法官卡尔·尼科尔斯在华盛顿特区作出了这一决定，时间就在该禁令原定于周日午夜生效前几个小时。
"Its technology in flexible DC is the first trial in China Southern Power Grid's territory, and will further clean up the energy mix in the coastal Greater Bay Area," Wei said.
With its grid spanning 2,000 km from west to east and a total installed capacity of 310 gigawatts, China Southern Power Grid operates eight AC and 10 DC projects in the West-to-East Power Transmission Project, with a maximum transmission capacity of 50 GW.
The project, called Multi-terminal UHVDC Demonstration Project from Wudongde Power Station to Guangdong and Guangxi, or Kunbei-Liubei-Longmen DC Project for short, passes through Southwest China's Yunnan and Guizhou provinces, South China's Guangdong province and Guangxi Zhuang autonomous region.
The company supplies AC and DC charging stations, as well as the necessary software platforms to a range of customers that include EV manufacturers, EV charging network operators and real estate developers.
ABB has sold more than 11,000 DC fast-charging points across 76 countries worldwide.
Within China, ABB has been working with BYD and Daimler since 2016, supplying its DC Wallbox units for charging Denza electric vehicles.
CFLD attended as the country's only representative of social capital promotion via PPP at the international financial body's headquarters in Washington DC on Sept 18.
Over time, JLABS sites have been set up in San Diego, San Francisco, Boston, Lowell, Houston, Toronto, Beerse, Belgium, New York City and Washington DC, nurturing over 540 companies.
According to Energy China, its domestic achievements include the construction of the Three Gorges Project, the largest hydropower station in the world in terms of installed capacity, the AC and DC transmission lines with the highest voltage level, and the largest number of 1,000 MW ultra supercritical coal-fired units.
State Grid, with total assets of 3.8 trillion yuan ($589 billion) and electricity sales reaching 3.9 trillion kilowatt-hours annually, has invested some 150 billion yuan in the past eight years to boost the development of smart grid technologies, including ultra-high-voltage electricity transmission, new energy technology, key technologies of the ffl500kV flexible DC valve and DC circuit breakers.
In addition to CNN, Time Warner owns TV networks HBO, TBS and TNT as well as Warner Brothers Entertainment and DC Comics.
"When you go to Washington DC, you feel a lot of pressure .
China's bike-sharing company Mobike created a buzz when distributing its dockless orange-and-silver bicycles in the US capital of Washington DC earlier this week, hoping to fill a gap for the city's public transportation network with an easy-to-use option.
Washington DC officials said they welcomed Mobike as the city's first dockless bike-sharing program and spoke highly of its technology-driven operations that use real-time trip and city data, including traffic and weather, to allocate their fleet to serve both users and the city.
It is an unwanted scenario in Washington DC, which values its city appearance very much.
Authorities in Washington DC that has had no regulations for Mobike and other bike-sharing service providers give them half a year to test the services before working out rules to address problems that could pop out.
Mobike is confident that the Washington DC pilot will be the first of many partnerships that allow the company to "make cycling the most convenient and affordable for choice for transportation all around America," she added.
Currently, United Airlines offers direct flights from major Chinese cities to New York, Washington DC, Chicago, San Francisco, Los Angeles and Guam.
Gree has brought R32 multifunctional air energy heat pump water heater, Clivia hanging machine and DC frequency conversion condensing unit.
"Growth remains weak by historical comparison, both in the near and medium term," Georgieva said in a speech in Washington, DC, ahead of the IMF-World Bank spring meetings next week.
In addition to shipping three giant pandas from Washington DC to Chengdu, the capital of Southwest China's Sichuan province, earlier this month, the US company announced a new flight service between Ho Chi Minh City, Vietnam, and Guangzhou, the capital of South China's Guangdong province, on Nov 1, facilitating swift connections between Vietnam and other markets in Asia, the Middle East, Africa and Europe.
Liu said China's power system has gradually developed into the world's largest in terms of transmission capacity and highest in terms of transmission voltage levels while featuring a multi-region power grid that integrates both AC and DC transmission.
State Grid Corp of China, transmitting power to 88 percent of China's total area, plans 24 new AC transmission lines and 14 DC transmission lines with a total investment of 380 billion yuan during the 14th Five-Year Plan period (2021-25).
Another example is the Qinghai-Henan ultrahigh-voltage direct-current project, a 1,587-km, 800-kilovolt DC line to transmit renewable energy from the country's western parts to central parts.
The Qinghai DC project kicked off construction on Oct 15 last year and is likely to commence operations by the end of the 14th Five-Year Plan period, said State Power Investment, its operator.
Focusing on economic and social development as well as energy resource exploration, State Grid will continue to strengthen construction of power grids in Xinjiang during the 14th Five-Year Plan period (2021-25) and enhance construction of the third UHV direct current (DC) power line and plan the fourth UHV DC line to improve power export capacity, the central SOE said.
According to Xie Xiaoping, president of Huanghe Hydropower Development Co Ltd, a subsidiary of State Power Investment Corp, the company is responsible for part of the Qinghai-Henan ultra-high-voltage direct current project-a 1,587-kilometer 800-kilovolt DC line to transmit renewable energy from the country's western parts to central parts.
黄河水电开发有限责任公司（隶属于国家电力投资集团）董事长谢小平表示，该公司承担了青海至河南特高压直流输电工程的一部分。该工程是一条长达1587公里、电压等级为800千伏的直流线路，旨在将我国西部地区的可再生能源输送到中部地区。
The Qinghai DC project's capacity is the under 1 million kW.
青藏直流工程的容量在100万千瓦以下
State Power Investment Corp said on Friday that it has commenced construction of a photovoltaic project in Qinghai province, which sees a total installed capacity of almost 1 million kilowatts－also part of the Qinghai-Henan ultrahigh-voltage direct current project, a 1,587 kilometer 800 kilovolt DC line to transmit renewable energy from the country's western regions to central areas.
国家电力投资集团有限公司周五宣布，已启动在青海省建设一个光伏项目，该项目总装机容量接近100万千瓦，同时也是青海至河南特高压直流工程的一部分。该工程包括一条长达1587公里、电压等级为800千伏的直流输电线路，旨在将我国西部地区的可再生能源输送到中部地区。
It is part of the Qinghai-Henan ultra-high-voltage direct current project, a 1,587 km-long 800kV DC line to transmit renewable energy from the country's western parts to central parts.
这是青海-河南特高压直流工程的一部分，该工程包括一条全长1587公里、电压等级为800千伏的直流输电线路，旨在将我国西部地区的可再生能源输送到中部地区。
Wei Hanyang, a power market analyst at Bloomberg New Energy, said he believes the 1,100kV DC transmission line has ensured energy security in the most populated areas in eastern parts of China by delivering electricity generated in the less-populated northwestern region of China.
彭博新能源电力市场分析师魏寒阳表示，他相信这条1,100千伏直流输电线路通过将中国西北部人口稀少地区产生的电力输送至中国东部人口最密集的地区，确保了能源安全。
State Grid Corp of China has invested a total of 12.5 billion yuan ($1.77 billion) in the world's first flexible direct current (DC) power grid project, the Zhangbei flexible direct current power grid, which was put into operation at the end of June.
The transmission line, the world's first renewable energy-based flexible DC power transmission system, is capable of transmitting about 14.1 billion kWh of power to Beijing each year.
"State Grid has been building up its expertise and brand name in flexible DC in both domestic and global markets, Wei said.
Flexible direct current power project to boost clean energy supply in areaThe Zhangbei flexible direct current (DC) power grid was put into operation on Monday, a move which industry insiders believe will play a major role in supplying Beijing with cleaner electricity generated by renewable energy while making Beijing 2022 the first Winter Olympic Games in history to exclusively use green energy sources.
"In 2017, China won the tender of exporting the flexible DC technology to the United Kingdom to connect a remote island to the north of Scotland.
While that project runs on a lower voltage, it also requires power storage facilities similar to the ones adopted by the Zhangbei flexible DC project.
State Grid is also building up its expertise and brand name in flexible DC in both the domestic and global markets, Wei said.
So that's fundamental to the future of business aviation," said Ed Bolen, president and CEO of the National Business Aviation Association based in Washington, DC.
Work on China Southern Power Grid's 24.25 billion yuan ($3.59 billion) Wudongde DC (direct current) Project, the world's first multi-end flexible ultrahigh voltage direct current power transmission (UHVDC) project, is progressing steadily and expected to start operations by 2020, a company official said.
"Compared with the more frequently used 500kV high voltage direct current power transmission (HVDC), the company decided on 800kV UHVDC for higher power capacity and more stable transmission to meet the growing power demands of the Greater Bay Area," said Zhang Yan, deputy general manager for the Kunming's operations of the Wudongde DC Project.
Shao Rongjia from Shanghai said she and her cousin would visit a famous cupcake shop in Georgetown, Washington, DC.
About five years ago, when traveling in the US, she was bitten by a squirrel in Washington DC.
Joining the chorus of industrial groups in opposing the release of a fresh list of Chinese products subject to 25 percent tariffs starting on Aug 23, the farmers group is distributing ads telling listeners "how decisions in Washington DC are hurting their farms, their neighbors and the economy of rural America", according to Sara Lilygren, president of the Farmers for Free Trade Board.
As of April, there were a total of 868,000 public charging piles, including 363,000 DC charging piles, 505,000 AC charging piles, and 426 AC/DC integrated charging piles across the country, according to the China Electric Charging Infrastructure Promotion Alliance.
China's 5G leader Huawei also plans to develop its Huawei HiCharger DC fast charging module, partnering with State Grid Corp, China Southern Power Grid and Star Charge.
BMW and Daimler said Wednesday they plan to exit the North American car-sharing market, with the joint venture partners halting operations in Montreal, New York, Seattle, Washington DC and Vancouver, as they focus on the European market.
The industry players were on the lookout for technology linkups in related fields such as DC motors, motor control systems and EV battery cells.
The 19 states, and Washington DC, announced they would sue in what is likely to be a heated legal showdown over the proposal.
He published the book China: The Bubble That Never Pops in 2020, suggesting that China's economy and financial system are "more resilient than critics in the West give them credit for", and China's economic and financial policymakers are "more innovative, more ingenious at better solving problems than critics here in Washington, DC, or on Wall Street give them credit for".
Additional rumblings from lawmakers in Washington DC that Chinese firms may be barred from future listings on US bourses only adds to the anxiety.
Zhou Xiaochuan, governor of the People's Bank of China, the nation's central bank, said at the Group of 30 International Banking Seminar in Washington DC last month, the Financial Stability and Development Committee will focus on regulations of four areas: shadow banking, asset management sector, internet finance or fintech, and financial holding companies.
US Federal Reserve Chair Janet Yellen speaks during a news conference in Washington DC, June 14, 2017.
Asian Infrastructure Investment Bank (AIIB) President Jin Liqun (L) attends the Development Committee Meeting during the World Bank and International Monetary Fund (IMF) annual Spring Meetings in Washington DC, April 16, 2016.
US President Donald Trump attends a press conference at the White House in Washington DC, on April 12, 2017.