to prep.对于；为了；(表示方向)到；向；(表示间接关系)给adv.（表示方向）去；（门）关上
双语例句
His gift of money hadn't been sufficient to prime the pump, and they went bankrupt. 他的赠款不足以使企业复苏，结果他们都破产了。
It may be true that, if this were the best of all possible worlds, the food surplus in the developed countries would be sufficient to answer the needs of the starving millions elsewhere. 发达国家的剩余食品可以满足其它地方无数饥民的需要，这种说法，如果真可以成为现实的话，也许不会有错。
