weak at the knees 汉语意思： （因激动、害怕、爱慕等）双腿发软，心慌意乱 例句： When she saw her favorite singer on stage, she felt weak at the knees. 当她在舞台上看到她最喜爱的歌手时，她激动得双腿发软。 The news was so shocking that it left him weak at the knees. 这个消息如此令人震惊，让他感到心慌意乱。