lack /læk/ I. vt. & vi. 缺乏，不足，没有：As a flyer, James lacks perseverance. 作为一名飞行员，詹姆斯缺乏坚定性。 We lacked the strength to walk any further. 再往前走我们没有力气了。be lacking (in)缺少：Humour is lacking in his speeches. 他的演讲中缺乏幽默。lack for 缺少：As he is rich he lacks for nothing. 他很富有，什么也不缺。 ‖II. n. ［u］(常可与a连用)缺乏，没有：lack of 缺少：He feels a lack of confidence. 他感到缺乏自信心。We have no lack of supporters. 我们有很多支持者。The drought is caused by a lack of rain. 旱灾是雨水不足造成的。