请帮我解答！！关于 jump off

b. river

jump off:

跳下来

例句与用法:
1. Somebody dared me to jump off the bridge into the river.
有人激我敢不敢从桥上跳进河里.

2. The police managed to dissuade him from jumping off the building.
警方已设法劝他不要从大楼上跳下来。

3. Don't jump off a train when it's on the move.
火车未停稳时万勿跳下.

4. Don't jump off the deep and. I was just trying to be helpful.
不要这么粗暴地和我说话，我只是想帮一下忙。