用作定语
▲～+n.
 We have gained sufficient experience to tackle this problem.我们已经有了足够的经验来处理这个问题。
用作表语
▲S+be+～
 A word to the wise is sufficient.心有灵犀者一点就通。
▲S+be+～+prep.-phrase
 His income is sufficient for his needs.他的收入能满足他的需要。
▲S+be+～+to-v
The rain was not sufficient to do any harm.雨量不足对庄稼有害。

sufficient, adequate, ample, enough
参见adequate条。

［派生词］ sufficiency n.充足
［同义词］   adequate, enough