turn a blind eye

US /tɜrn ə blaɪnd aɪ/
UK /tɜrn ə blaɪnd aɪ/
"turn a blind eye" picture
1.

视而不见, 假装没看见

to intentionally ignore something that you know is wrong or illegal

:
The authorities often turn a blind eye to minor infractions.
当局经常对轻微违规行为视而不见
She decided to turn a blind eye to her son's mischievous behavior.
她决定对儿子的顽皮行为视而不见