threat1.威胁,恐吓[C][U][+to-v]2.构成威胁的人(或事物)[S][(+to)]Some people think that machinery is a threat to their jobs.一些人认为机器是对他们工作的一种威胁.3.凶兆;征兆[S][(+of)]wheel1.轮子,车轮[C]2....