The audience was so quiet you could have heard a pin drop.

观众安静得连针落地的声音也听得见。

《牛津词典》

One could have heard a pin drop.

一根针掉在地上都能听见。

youdao

When he spoke at the meeting, you would hear a pin drop.

等他一讲话， 会场鸦雀无声。

《新英汉大辞典》

"You could hear a pin drop, " says Charles Dockendorff, chief financial officer and another Tyco veteran.

FORBES: Magazine Article

You could hear a pin drop, and the typical friendly greetings were absent.

FORBES: What I Learned from Leaving the Safe Unlocked

But when you're in those blocks and the whole stadium is quiet, you can hear a pin drop, literally.

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