2. 预示,是...的征兆;有...的危险[+to-v] Dark skies threatened rain. 天空发黑预示要下雨。 threatn. [ ] n. 1. 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...