作情态动词时意为“必要” v.(动词) need.ed,need.ing,needs aux.(助词) To be under the necessity of or the obligation to: 必须要:必须要,有义务要: They need not come. 他们不必来 v.tr.(及物动词) To have need of; require: 需要;想要: The family needs money. 这个家庭需要钱 v.intr.(不及物动词) To be in need or want. 需要,想要 To be necessary. 有必要