pin
n. 大头针，别针;胸针，饰针
vt. （用大头钉等）固定，别上，钉住
adj. 大头针的，别针的，针的

【例句】
When he spoke at the meeting, you would hear a pin drop.
等他一讲话，会场鸦雀无声。

You could hear a pin drop, they were so entranced.
你可以听见一根针掉落的声音，他们太入迷了。