letsthdown
—phrasal verbwithletverbuk/let/us/let/present participleletting|past tense and past participlelet
(CLOTHES)
If youletdown apieceofclothing, you make itlonger.
把（衣服）放长一些，将（衣服）加长
Mytrousersshrankin thewashso Iletthem down.我的裤子洗过后缩水了，所以我把裤腿放长了。
(AIR)
UK
If youletdown somethingfilledwithair, youcausetheairto go out of it.
给…放气，放出…中的空气
Someoneletmytyresdown while I was at thegym.我在健身房时有人把我的车胎给放了气。