| 词汇 | laugh up your sleeve |
| 释义 | laugh up your sleeve idiom 窃笑，暗自感到好笑 to secretly find something funny They're very polite in your presence, but you get the feeling they're laughing up their sleeves. 当着你的面他们都很有礼貌，但你能感觉到他们在暗自发笑。 |
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