1. They decided to leave the city behindsb'.s back. 他們決定秘密地離開(kāi)這座城市。
2. Leavesb to do sth (line 4, Para.6): leavesbbehind and make him/her do sth All men have gone to town to make money, leaving the women to do the farm work. 男人都去城里掙錢(qián)了，把農活都留給女人去做。
3. Leavesb/sth behind phr v (=to leave a person, place, state permanently)v. 離開(kāi)某人某地或某國