Meaning: Cause to explode, let off 导致爆炸,放松 Example: What a tragedy, that someone would set off a bomb in a crowded place. 多么悲剧,有
Set in (季节等)来临;开始 The plum rain season has set in. 梅雨季节到了。 Set off 出发;启程;动身 I usually set off for work at 10:00. 我通常