necessary的名词形式是什么

necessary和necessity的例句

For her, books were as necessary to life as bread.

对她来说，书就像面包一样，是生活必需品。

If necessary, you can contact me at home.

必要的话，我在家时你也可以和我联系。

If necessary I can come at once.

如果有必要，我可以马上来。

There is agreement on the necessity of reforms.

对改革的必要性已经达成了共识。

The article proves the necessity of reform.

文章论证了改革的必要性。

I often drop into the store for some daily necessities.

我常光顾那家小店买些日用品。