fly on the wall
US /flaɪ ɑn ðə wɔl/
UK /flaɪ ɒn ðə wɔːl/
成語
旁觀者, 不引人注意的觀察者
a person who observes a situation without being noticed or involved
範例:
•
I'd love to be a fly on the wall during their secret meeting.
我真想在他們秘密會議時當個旁觀者。
•
The documentary offered a fly on the wall perspective of the band's tour.
這部紀錄片提供了樂隊巡演的旁觀者視角。