fly on the wall

名词 n.
中文释义

英文释义

名词 n.
  1. A quiet, non-participating, or unseen observer; an eavesdropper or witness. idiomatic
    — James W. Gerard, ex-Ambassador to Germany, the first speaker of the evening, said that at that moment he would like to be a fly on the wall of the palace at Potsdam to hear what the Potsdam gang were saying about our soldiers.

词形变化

flies on the wall plural
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