off和out的区别
OUT 的语气比较粗鲁 OFF 的语气比较平和,普通人都这么说 set off: 出发,侧重于去某个地方 例句与用法: If you want to catch that train we'd better set off for the station immediately. 你要是想赶上那班火车,咱们就最好马上动身去火车站。 They've set off on a journey round the world. 他们已经开始环游世界. set out: 出发,开始...