I had been in Los Angeles just long enough to understand how essential a car is.
我们刚搬到洛杉矶没有多久，明白一辆汽车是多么必要。
Imagine your family completing an entire seder without skipping essential a haggadah that is easy to complete in its entirety!
想象一下你的家庭完成整个家宴没有必要跳了哈加达很容易全部完成！
The laser level land is essential a high-efficient level land technology in agriculture water-saving irrigation in the future of our country.
激光平地在我国今后的农业节水灌溉方面，是一项必需的高效平地技术。
Progress on the climate change bill is seen as essential a to a successful outcome at the international meeting on carbon reduction in Copenhagen in December.
气候变化法案的进展被视作促进12月哥本哈根减少碳排放的国际会议取得成功的必不可少的条件。
It is essential to build up the military option and show that this is not a bluff.
重要的是准备军事解决途径来证明这并不是虚张声势。
A ceasefire is an essential precondition for negotiation.
停火是谈判的必要前提。
We must pour out a large stream of essential words, unhampered by stops, or qualifying adjectives, or finite verbs.
我们必须大量使用基本词汇，不受句号、修饰性形容词或限定动词的限制。
Used metaphorically, the juxtaposed terms connote specific or essential traits of the being they refer to, introducing a mode of poetry as an almost habitual form of expression.
用比喻的方式，并列的术语隐含着它们所指称的存在的具体或本质的特征，引入了一种诗歌的模式作为习惯性的表达形式。
Another opinion is that the paintings were directly related to hunting and were an essential part of a special preparation ceremony.
另一种观点认为，这些画与狩猎直接相关，是一项特殊的准备仪式的一个重要组成部分。
Firstly, ambition plays an essential role because it serves as a driving force for people to achieve success.
首先，志向起着至关重要的作用，因为它是人们取得成功的动力源泉。
So we've been talking about nutrients, the elements in the environment that are essential for living organisms to develop, live a healthy life, and reproduce.
所以我们一直在讨论营养，环境中的元素对于生物体的发展，健康的生活和繁殖是必不可少的。
It's said that clichés are the worst sin a writer can commit, but to an oral bard, they were essential.
人们常说，陈词滥调是作家可能犯下的最严重的错误，但对于一个口头吟游诗人来说，它们是必不可少的。
"It is the recognition of a child's attempt, or the process in which they achieved something, that is essential," she says.
她说：“认可孩子的尝试，或是他们取得成就的过程，才是至关重要的。”
Creating this sanctuary is a bold move that the people of Palau recognise as essential to our survival.
建立这个保护区是一个大胆的举措，帕劳人民认为这对我们的生存来说至关重要。
It is a monumental scientific achievement, and its development illustrates the essential interplay between observation, prediction, and testing required for scientific progress.
它是一项不朽的科学发现，而且它的出现说明了观察、预测和检验（科研进程中必须的活动）之间基本的相互影响。
I agree that providing more access to public parks and sports facilities is an essential element when designing a new town.
我同意提供更多的公园和体育设施是设计新城镇时必不可少的元素。
Hard work is often an essential ingredient of luck because it enables one to take advantage of a lucky encounter.
努力工作通常是运气的重要组成部分，因为它能让人具备利用幸运际遇的能力。
We all seem to agree that a college education is wonderful, and yet strangely we worry when we see families investing so much in this supposedly essential good.
我们似乎都同意大学教育是极好的，但奇怪的是，当我们看到家庭在这个本应是必不可少的好东西上投入如此之多时，我们却感到担忧。
Creating this sanctuary is a bold move that the people of Palau recognize as essential to our survival.
建立这个避难所是一个大胆的行动，而帕劳人民认为，这是我们生存的必要条件。
Since the northeast region of North American is interconnected by many streams and waterways, water transportation by vessels like a canoe was most essential.
由于北美东北部地区由许多溪流和水路相连，所以通过像独木舟这样的船只进行水上运输是最重要的。
Maintaining harmony at home is essential for the well-being of an individual, a couple and their offspring, and even the society.
维持家庭的和谐，对个人、夫妻、后代乃至整个社会都是至关重要的。
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。
As a rule, it is essential that the poor's productive capabilities be mobilized and the conditions for developing these human resources be improved.
通常，必须调动穷人的生产能力，改善开发这些人力资源的条件。
Surplus snowfall is essential for a glacier to develop.
过剩的降雪是冰川形成的必要条件。
Another module continued to pump coolant through a separate loop, but astronauts had to power down non-essential equipment to prevent overheating.
另一个模块继续通过一个单独的循环泵入冷却剂，但宇航员不得不关掉不必要的设备以防止过热。
Working hard is not a guarantee of great success, but it is among the essential requirements.
虽然努力不能保证成功，但它是最基本的要求之一。
The gap between the rich and the poor makes it essential that the government adopt a dynamic solution to the problem.
贫富差距使得政府必须采用动态的方案来解决这个问题。
These circular buds have played an essential role in the Native American diet for a long time.
很长一段时间里，这些圆形的蓓蕾在美国本土的饮食上有着举足轻重的作用。
The ability of a species to compete and adapt to a gradually changing environment is not the only ability that is essential for survival.
一个物种竞争和适应逐渐变化的环境的能力并不是生存所必需的唯一能力。
Practicing for a speech is essential.
练习演讲必不可少。
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