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TOEFL IELTS BNC: 1155 COCA: 1949
essentialadjectiveuk/ɪˈsen.ʃəl/ us/ɪˈsen.ʃəl/

B1 necessary or needed必要的，必不可少的

Government support will be essential if the project is to succeed.这个项目能否成功，政府的支持至关重要。
There is essential work to be done before the building can be re-occupied.这座楼在重新入住前必须进行必要的维修。
Water is essential for/to living things.水对于生物来说是必不可少的。
It is essential (that) our prices remain competitive.我们保持价格方面的竞争优势是至关重要的。
[ + to infinitive ] For the experiment to be valid, it is essential to record the data accurately.要保证实验的有效性，就必须精确地记录数据。

More examples

The books on this list are essential reading for the course.

Fresh fruit and vegetables form an essential part of a healthy diet.

During the emergency, people stocked up on essential items like candles, medicines and tins of food.

It's essential that she has this medicine every day.

Computer literacy is becoming as essential as the ability to drive a car.

essentialnoun [ C usually plural ]uk/ɪˈsen.ʃəl/ us/ɪˈsen.ʃəl/

a basic thing that you cannot live without必需品；不可缺少的东西

Because I live in a remote village, I regard my car as an essential.因为我住在一个偏远的村子里，所以我把汽车看作是必需品。
When we go on holiday, we only take the bare essentials.我们去度假时，只带一些最基本的必需品。
This leaflet will give you the essentials of how to prepare for a hurricane.这本小册子会告诉你飓风到来前如何做好准备的基本知识。
TOEFL IELTS BNC: 1155 COCA: 1949
essential

adjective

VERBS | ADVERB | PREPOSITION VERBS➤appear, be, seem顯得必要；必要；好像必要▸➤become變得必要◇It is becoming almost essential for students to have a second language.學生掌握第二語言幾乎是必須的了。➤remain依然必要▸➤make sth使⋯必要◇Increased competition makes it essential for the business to innovate.日益激烈的競爭使企業創新變得極為重要。➤consider sth, deem sth, find sth, regard sth as, see sth as, think sth認為⋯有必要；視⋯為必不可少◇Do you consider these textbooks essential for the course?你認為這個課程必須採用這些教科書嗎？ADVERB➤really, truly, very (NAmE) 的確／確實／非常必要▸➤absolutely絕對必不可少▸➤almost, virtually幾乎必不可少▸➤fairly相當必要➤clearly顯然必要◇A printer is clearly essential to such a task.顯然，這一工作必須要有一台打印機。➤equally同樣必不可少◇Diet is crucial; exercise is equally essential.飲食很關鍵，鍛煉也同樣必不可少。➤by no means絕非必要◇Although useful, the accessories are by no means essential.儘管這些配件很有用，但並非必不可少。PREPOSITION➤for對⋯是必要的◇the skills essential for success成功的必備技巧➤to對於⋯不可缺少◇He believed that some form of religion was essential to human life.他認為宗教信仰對於人生不可或缺。
TOEFL IELTS BNC: 1155 COCA: 1949
essential noun
⇨ basics (the essentials of English grammar) ⇨ need (the bare essentials)essential adj.
⇨ essential (Experience is essential for this job.) ⇨ fundamental (the essential character of the town)essential

adjective

  ➡ See also the entries for important and necessary 另见important条和necessary条essential ♦︎ vital ♦︎ crucial ♦︎ critical ♦︎ decisive ♦︎ indispensable ♦︎ imperative ♦︎ pivotal ♦︎ of the essenceThese words all describe sb/sth that is extremely important and completely necessary because a particular situation or activity depends on them. 这些词均表示极其重要的、完全必要的。PATTERNS AND COLLOCATIONS 句型和搭配◆essential / vital / crucial / critical / decisive / indispensable / imperative / of the essence for sth◆essential / vital / crucial / critical / indispensable / pivotal to sth◆to be essential / vital / crucial / critical / imperative that...◆to be essential / vital / crucial / critical / imperative to do sth◆an essential / a vital / a crucial / a critical / a decisive / an indispensable / a pivotal part / factor◆an essential / a vital / a crucial / a critical / an indispensable ingredient / tool◆an essential / a vital / a crucial / a critical component◆essential / vital / crucial services◆the crucial / critical / decisive / pivotal moment◆to play an essential / a vital / a crucial / a critical / a decisive / a pivotal part / role in sth◆of vital / crucial / critical / decisive importance◆absolutely essential / vital / crucial / critical / decisive / indispensable / imperative / pivotal◆quite essential / vital / crucial / critical / decisive / indispensable■ essential extremely important and completely necessary, because without it sth cannot exist, be made or be successful 极其重要的；完全必要的；必不可少的◆Experience is essential for this job.对于这个工作，经验是非常重要的。◆Money is not essential to happiness.金钱并非是幸福必不可少的条件。◆It is essential that you have some experience.你必须要有些经验，这很重要。◆It is essential to keep the two groups separate.将这两个组隔开是完全必要的。◆The museum is closed while essential repairs are being carried out.博物馆现正关闭以进行必要的修缮。OPP inessential ⓘ Inessential things are not necessary. * inessential指不必要的◆inessential luxuries不必要的奢侈品   see also essential ⇨ need noun ■ vital ˈvaɪtl essential 极其重要的；完全必要的；必不可少的◆Bean sprouts contain many of the vitamins that are vital for health.豆芽含有多种对健康来说必不可少的维生素。◆Good financial accounts are vital to the success of any enterprise.妥善的金融账目对任何企业的成功都至关重要。◆It is vital that you keep accurate records when you are self-employed.从事个体经营的人要准确记录账目，这十分重要。◆The police play a vital role in our society.警察在我们的社会中起着极其重要的作用。▸ vitally

adverb

◆Education is vitally important for the country's future.教育对国家的未来是极其重要的。NOTE 辨析 Essential or vital?There is no real difference in meaning between these words and they can be used with the same range of nouns and structures. However, there can be a slight difference in tone. Essential is used to state a fact or opinion with authority. Vital is often used when there is some anxiety felt about sth, or a need to persuade sb that a fact or opinion is true, right or important. Vital is less often used in negative statements. 这两个词在含义上没有实质差别，所搭配的名词和结构也相同，但是语气上略有差异。essential指用权威的语气陈述事实或观点，vital常用于表示有些焦虑的语气，或用于劝说某人相信某一事实或观点是真实、正确或重要的。vital不常用于否定句◆It was vital to show that he was not afraid.重要的是要表现出他毫不畏惧。◆Money is not vital to happiness. ■ crucial ˈkruːʃl extremely important because a particular situation or activity depends on it 至关重要的；关键的◆Winning this contract is absolutely crucial to our long term success.赢得这份合同对我们的长期成功绝对是至关重要的。◆It is crucial that we get this right.我们把这个问题弄明白是极其重要的。◆He wasn't there at the crucial moment (= when he was needed most).紧要关头他却不在那里。▸ crucially

adverb

◆These things are all crucially important.这些事情全都极其重要。■ critical ˈkrɪtɪkl crucial 至关重要的；关键的◆Price and availability are the critical factors that will determine product success.价格和购买是否便利都是决定产品成功的关键因素。◆If the temperature drops those critical two degrees, the engine will stop functioning.如果温度降低那关键的两度，发动机将停止运转。▸ critically

adverb

◆The next few days will be critically important to the President's election chances.今后的几天对总统选举的成败至关重要。NOTE 辨析 Crucial or critical?There is no real difference in meaning between these words and they can be used with the same range of nouns and structures. However, there is sometimes a slight difference in context. Critical is often used in technical matters of business or science; crucial is often used to talk about matters that may cause anxiety or other emotions. 这两个词在含义上没有实质差别，所搭配的名词和结构也相同，但是使用语境略有差异。critical常用于商务或科学语境谈论专业问题，crucial常修饰可能引发焦虑或其他情感的事情。■ decisive dɪˈsaɪsɪv of the greatest importance in affecting the final result of a particular situation 决定性的；关键的◆Gettysburg was the decisive battle of the Civil War.葛底斯堡战役在美国内战史上具有决定性的意义。◆Signing the treaty was a decisive step (= an important action that will change a situation) towards a cleaner environment.条约的签署是向更洁净的环境迈出的关键性一步。ⓘ Decisive is not used simply to mean 'extremely important'. * decisive不单单表示非常重要◆Reducing levels of carbon dioxide in the atmosphere is of decisive importance. It is used when you are making a judgement that sb/sth was or will be the most important fact affecting the result of a particular past or future situation. * decisive是指对过往或将来之事态发展结果具决定性影响的◆Morrison scored the decisive goal in the 75th minute of the game.莫里森在比赛进行到75分钟时进球得了关键的一分。 ▸ decisively

adverb

◆The governing party is expected to win decisively in the elections.预计执政党将在大选中获得决定性的胜利。■ indispensable ˌɪndɪˈspensəbl essential; too important to be without 不可或缺的；必不可少的◆Cars have become an indispensable part of our lives.汽车已经成为我们生活中必不可少的一部分。◆She made herself virtually indispensable to the department.她成功地让自己成了这个部门的中坚分子。OPP dispensable ⓘ Dispensable things are not necessary and can be got rid of. * dispensable指不必要的、可有可无的◆They looked on music and art lessons as dispensable.他们觉得音乐课和艺术课可有可无。 ■ imperative ɪmˈperətɪv [not usually before noun] (formal) extremely important and needing immediate attention or action 重要紧急的；迫切的；急需处理的◆It is absolutely imperative that we finish by next week.我们的当务之急是在下周内把事情完成。■ pivotal ˈpɪvətl (rather formal, especially written) extremely important because a particular situation or activity depends on it 关键性的；核心的◆The Foreign Secretary has played a pivotal role in European affairs.外交部长在欧洲事务中起到了关键性的作用。◆Accountancy, law and economics are pivotal to a successful career in any financial services area.会计学、法学和经济学在任何金融服务领域都是事业成功的关键。ⓘ Pivotal is used especially to describe the part that sb/sth plays in a particular situation; it is not used to describe items or actions that are just extremely important. * pivotal尤指在某一情形下所起的关键性作用，不用于描述非常关键的事物或行为◆pivotal services/supplies/repairs ◆It is pivotal that we get this right. ■ of the ˈessence

idiom

 (rather informal) essential 必不可少；非常重要◆In this situation time is of the essence (= we must do things as quickly as possible).在这种情况下，时间是关键。◆Speed is of the essence when transporting casualties to hospital.运送伤者去医院时，速度至关重要。
TOEFL IELTS BNC: 1155 COCA: 1949
essential
Necessary: necessary, essential, vital...
Natural, basic and essential: basic, fundamental, natural...
Typical, traditional and usual: typical, traditional, usual...
Good for you or for your health: healthy, wholesome, well-balanced...
Important thing or detail: feature, priority, element...

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