necessity

[ni'sesiti]

n.需要, 必需品, 必然

例句与用法：

It was done under the pressure of the necessity.

这件事是在迫切需要的情况下而做的。

Necessity is the mother of invention.

需要是发明之母。

The doctor asked us to call him during the night except in case of necessity.

医生吩咐我们，除非必须，否则不要在夜里叫他。

词形变化：

名词复数: necessities |

详细释义：

n.

1. 需要, 必要性[U][S1][(+of/for)]

She felt the necessity of accepting the invitation.

她感到必须接受这一邀请。

2. 必需品[C][(+of/for)]

Television is considered a necessity by a lot of people.

许多人认为电视是一件生活必需品。

3. 必然(性)[U][S1]

Night follows day as a necessity.

白天过去, 夜幕降临, 这是必然的。

4. 贫穷; 困难[U]

This family is in great necessity.

这户人家穷困到极点。

短语词组：

be under the necessity of doing sth.

1. 必须做某事

We are now under the necessity of doing the work.

我们现在必须做这工作。