We'll have to double up on books; there aren't enough to go around.
因为书不够人手一册，我们只好合用了。
He scarcely earns enough to keep himself and his family.
他挣的钱几乎不够养活他自己和家人。
Our plans need to be flexible enough to cater for the needs of everyone.
我们的计划必须能够变通，以满足每个人的需要。
I was stupid enough to believe him.
我可真够糊涂的，竟然相信他的话。
I wouldn't get involved ─ he's old enough to fight his own battles.
我不想参与——他已经长大，能独自应付了。