tip off
动词- To alert or inform (someone), especially confidentially. · An anonymous caller tipped off the police that the suspect would be in the area.· Someone must have tipped him off. [A likely explanation for why he has disappeared.]
- To put the ball in play by throwing it up between two opponents.
- To begin. · The game tips off in an hour, so hurry back!
- To use a particular brush technique for producing a flawless surface on a wet coat of paint.
在真实文章中学习tip off
注册免费账号后，在图书馆中把鼠标悬停在任何单词上即可看到意思，还能听朗读、收藏单词并按你的记忆安排复习，看到每本书你已经认识多少。