词组	let sth down
释义	●ˌlet sth ˈdown1. to make sth go lower 放下；放低；降下◆We let the bucket down on a rope. 我们用绳子把吊桶放下去。SYN lower sth (more formal) 2. to make sth longer, especially an item of clothing 把（衣服）放长◆I’m going to let the hem down a couple of centimetres. 我要把褶边放出几厘米。OPP take sth up3. (BrE) to allow the air to come out of sth, such as a tyre 给（轮胎等）放气◆The tyres on his car had been let down during the night. 晚上他的车胎被人放了气。OBJ tyre SYN deflate sth (formal) [v + n/pron + adv] [v + adv + n] ●let your ˈhair down (informal) to relax and enjoy yourself, often in a lively way （快活地）放松，轻松一下◆I saw my parents letting their hair down on the dance floor. 我看见我爸妈在舞池快乐地跳着舞。
随便看	bluff sb out (old-fashioned, informal, especially NAmE) blunder blunder about/round, blunder about/round sth blunder around blunder around sth blunder into sth blurt blurt sth out board board sth up bob bob up bog bog down (NAmE) bog off (BrE, slang) boil boil away boil down to sth boil over boil sth down boil sth up (BrE) boil up bollix bollix sth up (NAmE, slang)

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