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Từ điển Oxford Advanced Learner 8th
let something down
▪ I. ˌlet sthˈdown derived
1. to let or make sth go down
•We let the bucket down by a rope.
2. to make a dress, skirt, coat, etc. longer, by reducing the amount of material that is folded over at the bottom
•This skirt needs letting down.
Opp: ↑take up
3. (BrE)to allow the air to escape from sth deliberately
•Some kids had let my tyres down.
Main entry: ↑letderived
▪ II. ˌlet sb/sthˈdown derived
to make sb/sth less successful than they/it should be
•She speaks French very fluently, but her pronunciation lets her down.
Main entry: ↑letderived
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