六级There is considerable and justified concern that the United States is falling behind much of the rest of the developed world in these essential disciplines.

人们有相当多的理由担心，美国在这些基本学科方面落后于其他发达国家。

六级The essential place to visit, however, was Italy.

然而，最重要的游览地是意大利。

四级Trust is essential in any important relationship, whether personal or professional.

信任在任何重要的关系中都是必不可少的，无论是个人关系还是职业关系。

六级The child of tomorrow, I realized, may actually be ahead of us, in terms of sensing not what is new, but what is essential.

我意识到，明天的孩子可能实际上走在我们的前面，不是在感知什么是新的，而是在感知什么是必要的。

六级It is not only polite, it is essential if we want to sell British products overseas.

如果我们想把英国产品卖到海外，这不仅是礼貌，也是必要的。

四级Speed, of course, is essential to the drive-through experience, and drive-throughs are hugely important to chains such as McDonald's, Burger king and Taco Bell.

当然，速度对于直通车体验至关重要，而直通车对于麦当劳、汉堡王和塔可钟等连锁店来说非常重要。

考研The details may be unknowable, but the independence of standard-setters, essential to the proper functioning of capital markets, is being compromised.

细节可能不可知，但对资本市场正常运行至关重要的标准制定者的独立性正在受到损害。

六级The youngish-looking man takes his little boy to the hermitage frequently so that when he grows up he will know what is essential

这个长相年轻的人经常带他的小男孩去隐居，这样他长大后就会知道什么是最重要的

考研It's true that high-school coding classes aren't essential for learning computer science in college.

的确，高中的编码课程对于大学里学习计算机科学不是必不可少的。

高考Darkness is as essential to our biological welfare, to our internal clockwork, as light itself.

黑暗对于我们的生物福利，对于我们的内部时钟系统，就像光本身一样重要。

六级Creating this sanctuary is a bold move that the people of Palau recognize as essential to our survival.

建立这一庇护所是帕劳人民认为对我们的生存至关重要的大胆举措。

六级Of course, you'll need some time to catch your breath every so often, but the essential massage is keep moving, extending and learning.

当然，你需要一些时间来不时地喘口气，但最基本的按摩是保持运动、伸展和学习。

六级By explaining some essential geological principles.

通过解释一些基本的地质原理。

六级There is no essential difference between seemingly opposite opinions.

看似相反的观点之间没有本质上的区别。

四级It is essential to our well-being, our health, our happiness.

它对我们的幸福、健康和幸福至关重要。

六级Energy Usage: Energy is an essential resource across the entire food production cycle, with estimates showing an average of 7-10 calories of input being required in the production of one calorie of food

能源使用：能源是整个食品生产周期的基本资源，据估计，生产一卡路里食品平均需要7-10卡路里的投入

六级What parents do, in other words, is of deep concern to the state, for the obvious reason that caring for children is not only morally urgent but essential for the future of society.

换言之，父母的所作所为是国家深切关注的问题，原因显而易见，照顾儿童不仅在道德上是紧迫的，而且对社会的未来至关重要。

高考The essential belief of the first free government in the world was liberty for all men who could control themselves and would take responsibility for the state.

世界上第一个自由政府的基本信念是所有能够控制自己并对国家负责的人都享有自由。

四级As a day-to-day essential, it will die off with the generation who read print newspapers.

作为一种日常生活必需品，它将随着阅读纸质报纸的一代人而消亡。

六级ingenuity is essential for science fiction writers

对于科幻作家来说，创造力是必不可少的

六级It is essential to advanced manufacturing.

它对先进制造业至关重要。

高考Determining where we are in relation to our surroundings remains an essential skill for our survival.

确定我们与周围环境的关系仍然是我们生存的一项基本技能。

四级They are essential to students' healthy growth.

它们对学生的健康成长至关重要。

六级She decided that she was going to try to just use cash for two weeks to make all of her essential purchases and see what that would do to her spending.

她决定用两周的时间用现金购买所有的必需品，看看这对她的消费有什么影响。

考研I think that, for the majority of scientific papers nowadays, statistical review is more essential than expert review,” he says.

我认为，对于当今大多数科学论文来说，统计审查比专家审查更为重要，”他说。

四级It is essential to a person's future academic success.

这对一个人未来的学术成就至关重要。

六级It lacks the vitamins and minerals essential for health.

它缺乏健康所必需的维生素和矿物质。

六级No, I wouldn't ever compromise on the essential, the ideas or the themes.

不，我永远不会在本质上、思想上或主题上妥协。

考研By all accounts he was a freethinking person, and a courageous one, and I find courage an essential quality for the understanding, let alone the performance, of his works.

大家都说他是一个思想自由的人，也是一个勇敢的人，我发现勇气是理解他的作品的基本素质，更不用说表现了。

高考It is an essential part of who we are today and who we will become.

这是我们今天和将来的重要组成部分。

四级Physical activity can improve blood flow to the brain, fueling memory, attention and creativity, which are essential to learning.

体力活动可以改善大脑的血液流动，增强记忆、注意力和创造力，这对学习至关重要。

六级Pursuing a career is an essential part of adolescent development.

追求职业是青少年发展的重要组成部分。

高考Emotional health is essential to a wonderful adult life.

情感健康对美好的成人生活至关重要。

四级It is essential that we act with integrity in order to build the kind of world in which we want to live

我们必须以正直的态度行事，以便建立我们想要生活的世界

考研To sum up: a system of conservation based solely on economic self-interest is hopelessly lopsided It tends to ignore, and thus eventually to eliminate, many elements in the land community that lack commercial value, but that are essential to its healthy functioning.

总而言之：一个完全基于经济自身利益的保护体系是不平衡的，它往往忽视并最终消除土地社区中许多缺乏商业价值但对其健康运行至关重要的因素。

六级Repositories are essential to scientific research.

知识库对科学研究至关重要。

六级In order to achieve a successful outcome or reward, some level of risk is almost always essential.

为了获得成功的结果或回报，一定程度的风险几乎总是必不可少的。

六级But this does not apply to everyone, so it is essential to establish your own rhythm.

但这并不适用于所有人，因此建立自己的节奏至关重要。