A dynamic government is necessary to meet the demands of a changing society.

一个有活力的政府必须适应社会的改变。

We convinced him that it was necessary to stay.

我们使他相信有必要留下。

A healthy liver is necessary to support life.

健康的肝脏对维持生命至关重要。

For them it is necessary to get support.

对他们来说，获得支持是必要的。

He said that's necessary to fight climate change.

他说，这对我们应对气候变化是很有必要的。

Physical exercise is necessary to reduce catatonic effects.

为了减少紧张症的影响，体育锻炼是必要的。

Additional doses may be necessary to maintain reversal.

可能需要额外的剂量来维持逆转。

It may be necessary to do something desperate.

可能有必要做一些孤注一掷的事情。

" Necessary? No, I should not say that it is necessary to kill."

“一定？不，我认为不一定要杀人。”

I did whatever was necessary to make it stop.

只要能让它停下 我做什么都可以。

Water is necessary to keep them in good shape.

水是它们保持良好身体状态的必需物质。

It's necessary to wash hands in the right way.

正确洗手是必要的。

You must forgive me if it's necessary to explain.

如果我不得不做些解释，你一定得原谅我。”

Expressing an obligation, when it's necessary to do something.

表示义务，当有必要做某事时。

'Must' here means that it's necessary to do something.

“Must”在这里表示有必要做某事。

They say the law is necessary to protect the monarchy.

他们说，为了保护君主制，法律是必要的。

It's necessary to destroy its ideology, funding and recruitment.

有必要摧毁其思想意识、资金和招募活动。

I don't think it's necessary to insult me.

我想你没必要这么侮辱我。

But he says the decisions are necessary to tackle inflation.

但他表示，这些决定对于应对通胀是必要的。

Drastic changes are necessary to improve the government of the country.

为了改进该国的政府，激烈的改革是必须的。