essential

adj.

1. 完全必要的；必不可少的；极其重要的
   completely necessary; extremely important in a particular situation or for a particular activity
   1. an essential part/ingredient/component of sth
      某事物必不可少的一部分 / 成分 / 组成部分
   2. Money is not essential to happiness.
      金钱对于幸福并非必不可少。
   3. Experience is essential for this job.
      对于这个工作，经验是非常重要的。
   4. essential services such as gas, water and electricity
      诸如燃气、水、电等必不可少的设施
   5. The museum is closed while essential repairs are being carried out.
      博物馆正在进行大修，在此期间暂停开放。
   6. It is essential to keep the two groups separate.
      将这两组隔开是完全必要的。
   7. It is essential that you have some experience.
      你必须得有些经验。
   8. Even in small companies, computers are an essential tool.
      即使在小公司里，计算机也是必不可少的工具。
2. 本质的；基本的；根本的
   connected with the most important aspect or basic nature of sb/sth
   1. The essential difference between Sara and me is in our attitude to money.
      我与萨拉的根本区别在于我们对金钱的态度。
   2. The essential character of the town has been destroyed by the new road.
      这个城镇的主要特色被这条新公路毁了。

noun

1. 必不可少的东西；必需品
   something that is needed in a particular situation or in order to do a particular thing
   1. I only had time to pack the bare essentials (= the most necessary things) .
      我只来得及装上最基本的用品。
   2. The studio had all the essentials like heating and running water.
      工作室里备有基本设施，如暖气装置和自来水。
2. 要点；要素；实质
   an important basic fact or piece of knowledge about a subject
   1. the essentials of English grammar
      英语语法基础

1. ADJ-GRADED 绝对必要的;必不可少的;基本的
   Something that is essential is extremely important or absolutely necessary to a particular subject, situation, or activity.
   1. It was absolutely essential to separate crops from the areas that animals used as pasture...
      将庄稼和放牧区分开绝对必要。
   2. As they must also sprint over short distances, speed is essential...
      由于他们也必须进行短跑，因此速度至关重要。
   3. Jordan promised to trim the city budget without cutting essential services.
      乔丹承诺在不减少基本服务的前提下，缩减市政预算。
2. N-COUNT 必需品;不可或缺之物
   The essentials are the things that are absolutely necessary for the situation you are in or for the task you are doing.
   1. The flat contained the basic essentials for bachelor life.
      那套公寓配有单身生活的基本必需品。
3. ADJ-GRADED 基本的;本质的；根本的
   The essential aspects of something are its most basic or important aspects.
   1. Most authorities agree that play is an essential part of a child's development...
      大多数权威人士都同意，玩耍在孩子成长过程中起着非常重要的作用。
   2. In this trial two essential elements must be proven: motive and opportunity.
      在这次审讯中，必须证明两个基本因素：动机和时机。
4. N-PLURAL （某学科的）基础，基本知识
   The essentials are the most important principles, ideas, or facts of a particular subject.
   1. ...the essentials of everyday life, such as eating and exercise...
      饮食、锻炼等日常生活的要素
   2. This has stripped the contest down to its essentials.
      这就使比赛精简到最基本的环节。
   3. ...the bare essentials.
      最简单的基本知识

1. If you are prosecuted by the police, then it is essential that you take specialist legal advice.
   如果你受到警方起诉，至关重要的是你要听取专业律师的意见。
2. Close collaboration between the Bank and the Fund is not merely desirable, it is essential.
   银行与基金会的紧密合作不仅可取，而且必不可少。
3. French and German were deemed essential
   法语和德语被认为是必不可少的。
4. 'Aromatherapy oils' are not pure essential oils but dilutions.
   “香薰精油”并非纯精油，而是经过稀释的。
5. It was absolutely essential to separate crops from the areas that animals used as pasture
   将庄稼和放牧区分开绝对必要。
6. As they must also sprint over short distances, speed is essential
   由于他们也必须进行短跑，因此速度至关重要。
7. Jordan promised to trim the city budget without cutting essential services.
   乔丹承诺在不减少基本服务的前提下，缩减市政预算。
8. The flat contained the basic essentials for bachelor life.
   那套公寓配有单身生活的基本必需品。
9. Most authorities agree that play is an essential part of a child's development
   大多数权威人士都同意，玩耍在孩子成长过程中起着非常重要的作用。
10. In this trial two essential elements must be proven: motive and opportunity.
    在这次审讯中，必须证明两个基本因素：动机和时机。
11. This has stripped the contest down to its essentials.
    这就使比赛精简到最基本的环节。
12. Polyunsaturated oils are essential for health. Excess is harmful, however.
    多不饱和油对健康很重要。但是，食用过量就会有害。
13. The ability to impart knowledge and command respect is the essential qualification for teachers
    具备传授知识并赢得尊敬的能力是对教师的基本要求。
14. Integrating the kids with the community, finding them a role, is essential
    使孩子融入社区并为他们找到某个角色非常必要。
15. An affordable nursery education service is an essential basic amenity.
    人们能负担得起的幼儿园教育是一项基本的社会福利。
16. What essential piece of clothing would you take?
    你会带哪件必不可少的衣服呢？
17. He lacked any of the practical common sense essential in management.
    管理方面基本的实用常识他一点也不懂。
18. It is essential that you are able to read a thermometer.
    最基本的是要能看懂温度计。
19. A rich and varied cultural life is essential for this couple.
    丰富多样的文化生活对这对夫妇而言至关重要。
20. The authorities have said they will attempt to maintain essential services.
    当局已表示他们将努力维持公共基础服务。
21. Speed is the essential ingredient of all athletics
    速度是所有田径运动项目的关键要素。
22. Never put any essential oils near the eyes. They are very strong and could sting
    千万不要将任何精油抹到眼睛周围。它们有很强的刺激性，可能会使眼睛产生刺痛感。
23. It is essential that we tackle this thorny problem.
    我们很有必要处理这个棘手问题。
24. To help provide essential nourishment, we've put together these nutritious drinks.
    为了帮助提供必要的营养，我们调配了这些营养饮料。
25. It is essential that your diet is varied and balanced
    关键是你的饮食要多样化，并保持均衡。
26. It's essential to know which is which as treatments will be quite different.
    由于治疗的方法将会全然不同，因此弄清楚哪个是哪个很重要。
27. It's essential you make the right decisions from the word go.
    关键是从一开始就作出正确的决定。
28. Tidiness in the workshop is really essential for producing good work
    工作间干净整洁对于生产出好的产品非常重要。
29. In analysing a situation, it's essential to distinguish the main aspect from the minor ones.
    分析形势，要看清主流和支流。
30. There are some things that are essential and others that can be done without.
    有些东西是必不可少的，而其他东西没有*也行。

  essential basic central chief crucial important main【导航词义：主要的，重要的】

  essential adj. 必要的，重要的，基本的

〔辨析〕语气较强，强调极其重要、必不可少的，暗含某物如缺少某部分，则失去其本质特征的意味。

  basic adj. 基本的，主要的

〔辨析〕指构成事物最重要、最根本部分的。

  central adj. 重要的，主要的

〔辨析〕强调相比较而言更重要或更有影响力的。

  chief adj. 最重要的，主要的，首席的

〔辨析〕强调最重要的或等级最高的，只作定语。

  crucial adj. 决定性的，关键的

〔辨析〕指处于某一重要转折点的，强调某事物非常重要，是其他事物依赖的对象。

  important adj. 重要的，重大的

〔辨析〕普通用词，指人有权威、有影响力的，或指事物意义重大、有价值的。

  main adj. 主要的，最重要的

〔辨析〕普通用词，多指同类事物中最大、最重要的。

noun

1. anything indispensable
   1. food and shelter are necessities of life
   2. the essentials of the good life
   3. allow farmers to buy their requirements under favorable conditions
   4. a place where the requisites of water fuel and fodder can be obtained

   Synonym:    necessityrequirementrequisitenecessary

adj

1. defining rights and duties as opposed to giving the rules by which rights and duties are established
   1. substantive law

   Synonym:    substantive

2. basic and fundamental
   1. the essential feature

3. of the greatest importance
   1. the all-important subject of disarmament
   2. crucial information
   3. in chess cool nerves are of the essence

   Synonym:    all-important(a)all important(p)crucialof the essence(p)

4. absolutely necessary
   1. essential tools and materials
   2. funds essential to the completion of the project
   3. an indispensable worker

   Synonym:    indispensable

5. being or relating to or containing the essence of a plant etc
   1. essential oil