Five men will be quite enough.

5个人就足够了。

There is enough food / food enough for ten people.

有足够10个人吃的食物。

He knows the situation well enough.

他对情况了如指掌。

I became confident enough to challenge the good tennis players.

我变得足够有信心去挑战好的网球选手了。

They were not calm enough and both said some really mean things.

他们俩都不够冷静，都说了一些刻薄的话。

He is old enough to look after his younger sister.

他长大了，能照看妹妹了。

Enough is as good as a feast.

凡事适可而止。/知足常乐。

We have enough to do to finish the job on time.

要按时完成这项工作，我们还得加倍努力。