例句：
He is old enough to take care of himself.
他大了，能照顾自己了。
Will you be kind enough to shut the door?
可否劳驾把门关上?
She is old enough to travel by herself.
她年纪够大，可以独自旅行了。
Is the river deep enough to swim in?
在这条河里游泳水够深吗?
He was not strong enough to do the work.
他不够强壮，不能做这工作。
