v.需要，必须( need的现在分词 )；（表示应该或不得不做）有必要； 双语释义：v.(动词)vt. 需要; 必须 want; require; deserveaux.(助动词)必须 have ton.(名词)[U]需要,需求 the condition in which sth necessary desirable, or very useful is missing, wanted[U]责任,必要 necessary duty, what must be done[P]需要的东西 sth one