request───n.请求;需要;vt.要求,请求 unfrequent───adj.不常见的;很少发生的 infrequently───adv.很少发生地;稀少地 in clearest───以最清晰的方式 双语使用场景 The new style has not been in request.───新的款式不大受欢迎. Mr. Johnson was very much in request as a lecturer.───...