know better
US /noʊ ˈbɛtər/
UK /noʊ ˈbɛtər/
1.
知道不該, 更明智
to be wise or experienced enough not to do something stupid or wrong
:
•
You should know better than to talk to strangers.
你應該知道不要和陌生人說話。
•
She's old enough to know better than to lie.
她已經足夠大了，應該知道不該撒謊。