What could be heard when they set off?什么意思

set off什么意思? 英语翻译 They said the laughter could be heard all th 急求英语改写句子1When they heard the news,they immediately set for S be set to 什么意思? set off啥意思? set off的意思 my car could not get started when i was about to set off i h 选择题 All of them wondered when-------- A. they can set off B. 把they remember what they were doing when they heard about th set off 啥意思来着 set off是什么英文意思? set sb off 的意思