n.(名词)

1. [U]必要(性); (迫切)需要 circumstances that force one to do sth; state of being necessary
2. [C]必需品 necessary thing
3. [S]自然规律 natural law that is seen as governing human action

Noun:

1. the condition of being essential or indispensable

2. anything indispensable;

   "food and shelter are necessities of life"
   "the essentials of the good life"
   "allow farmers to buy their requirements under favorable conditions"
   "a place where the requisites of water fuel and fodder can be obtained"
   

1.必然;必要
Thenecessity of something is the fact that it must happen or exist.

e.g. There is agreement on thenecessity of reforms...
对改革的必要性已经达成了共识。
e.g. As soon as thenecessity for action is over the troops must be withdrawn...
一旦军事行动的必要性不复存在，军队就必须撤出。

2.必需品;必不可少的事物
Anecessity is something that you must have in order to live properly or do something.

e.g. Water is a basicnecessity of life.
生命离不开水。
e.g. ...food, fuel and other daily necessities.
食物、燃料和其他日常必需品

3.不可避免的情况(或行动)
A situation or action that is anecessity is necessary and cannot be avoided.

e.g. The President pleaded that strong rule from the centre was a regrettable, but temporarynecessity.
总统辩解说，实行高度的中央集权虽不尽如人意，但暂时来说却是必要的。

1. 必要：对学校会计职业道德教育存有异议的观点主要体现在相关性(relevance)、必要(necessity)、有效性(effectiveness)上. 会计与道德不相关的第二种解释具有更大的迷惑性. 这种迷惑性表现在于理论上的深厚渊源. 相对于第一种解释中过于浅白的技术与道德的区分,

1. You must understand the necessity of education.
   你必须懂得教育的必要性。
2. There is no necessity to buy tickets in advance.
   没有必要提前买票。
3. He was forced by necessity to steal a loaf of bread.
   他为生活所迫偷了一块面包。
4. Most athletes can see the necessity of〔for〕 keeping training.
   大多数运动员都明白坚持训练的必要性。
5. Telephone is now a household necessity.
   现在电话是一种家庭必需品。

of necessity

必然,不可避免地necessarily; unavoidably

• I know the rigour of political necessity.

  出自：Burke

• The designation of evolution as a two-stage process of chance..and necessity.

  出自：Daedalus

necessity is the mother of invention.

需要是发明之母。

Want and necessity break faiths and oaths.

匮乏和需要可以打破信仰和誓言。

Water is of vital necessity in the desert.

在沙漠地区水是维持生命的必需品。

Food is a necessity, but wine is an extravagance.

食物是必需品,而酒则是奢侈品。

The necessity for making decisions devolves on him.

作出决策乃当务之急，此事必然地落在他身上。

That men would die was a matter of necessity; which men would die, though, was a matter of circumstance.

人总有一死，这是必然的事，不过哪些人死，这是偶然的事。

We recognize the necessity for a written agreement.

我们认为有必要签订一份书面协议。

We were discussing the necessity of employing more staff.

我们在讨论是否需要雇用更多员工。

There had never been any necessity for her to go out to work.

她从来就没有出去工作的必要。

This is, of necessity , a brief and incomplete account.

这必然是一份简略的、不完全的描述。

Many people cannot even afford basic necessities such as food and clothing.

许多人甚至买不起食物和衣服之类的基本必需品。

Air-conditioning is an absolute necessity in this climate.

这样的气候绝对需要有空调。

Living in London, he felt, was an unfortunate necessity.

他觉得在伦敦生活是迫于无奈。

There is agreement on the necessity of reforms...

对改革的必要性已经达成了共识。

As soon as the necessity for action is over the troops must be withdrawn...

一旦军事行动的必要性不复存在，军队就必须撤出。

Water is a basic necessity of life.

生命离不开水。

...food, fuel and other daily necessities.

食物、燃料和其他日常必需品

The President pleaded that strong rule from the centre was a regrettable, but temporary necessity.

总统辩解说，实行高度的中央集权虽不尽如人意，但暂时来说却是必要的。

necessity and feasibility of establishing accounting information market have been discussed in the third chapter.

第三章论述了建立会计信息市场的必要性和可行性.

They are in need of food, food is a necessity for all living things.

他们需要食物, 食物对一切生物是必不可少的.

Is it a logical necessity that higher wages will lead to higher prices?

工资高物价就高,这是合乎逻辑的必然规律 吗 ?

I look upon this as an absolute necessity.

我认为这是绝对必要的.

Money was a primal necessity to them.

对于他们,钱是主要的需要.

necessity caused me to come.

我不得不来.

You must understand the necessity of education.

你必须懂得教育的必要性.

Being a professional actor of necessity means working nights and Sundays.

作为职业演员必然意味着晚上和星期日要工作.

We e going to focus on the relationship between freedom and necessity.

我们将集中讨论自由和必要性之间的关系这一问题.

We must all, of necessity , die sooner or later.

我们大家迟早都会死.

Telephone is now a household necessity.

现在电话是一种家庭必需品.

The necessity for nuclear nonproliferation seems clear.

防止核扩散的必要性似乎清清楚楚.

necessity is the mother of invention.

[谚]需要是发明之母.

He urged the necessity for immediate action.

他强烈要求立即采取行动.

I was compelled to do so by absolute necessity.

我因绝对的需要,被迫这样做的.