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更新日期:2026-08-14
be a fly on the wall to be able to watch what happens without other people knowing that you are there做墙壁上的一只苍蝇,做不被察觉的观察者:•I wish I'd been a fly on the wall during that conversation.我真希望自己是墙壁上的一只苍蝇,能偷听到那次谈话。⇒FLY-ON-THE-WALL