| 单词 | weak at the knees |
| 释义 | ● ˌweak at the ˈknees (informal ) hardly able to stand because of emotion , fear , illness , etc .（因激动、恐惧、疾病等）两腿发软◆ His sudden smile made her go weak at the knees . 他突然笑了笑，使得她两膝发软。See also knee |
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