let down片語動詞KK [lɛt daʊn] /lɛt daʊn/發音片語動詞1使失望、令…失望、辜負可拆開I promised to help, and I won't let you down.我答應過要幫忙,絕不會讓你失望。2放下、降下可拆開She let down the blinds to keep the afternoon sun out.她把百葉窗放下,擋住午後的陽光。3放長、加長可拆開The tailor let down the hem of the trousers two inches.裁縫把褲腳放長了兩英寸。4放掉氣、洩氣可拆開Someone let down the tires on my bike overnight.有人在半夜把我自行車的輪胎放了氣。