敏锐的眼睛／洞悉一切的目光／逼人的注视／锐利的一瞥等
used to describe the fact of a person looking very carefully at someone or something, especially when they are trying to discover something, often making people feel uncomfortable
Sherlock Holmes gave him a piercing glance. 歇洛克‧福尔摩斯敏锐地瞥了他一眼。
He looked straight at me with his piercing blue eyes. 他那咄咄逼人的蓝眼睛直视着我。
Something in her piercing gaze suggested she was not to be trifled with.
He gave me a piercing stare and I felt myself blush.
She fixed her opponent with a piercing glare.
See also: piercing adjective