strong suit

US /ˈstrɔŋ suːt/
UK /ˈstrɔŋ suːt/
"strong suit" picture
1.

强项, 擅长

a particular aptitude or talent; a strength

:
Public speaking is not my strong suit.
公开演讲不是我的强项
Math has always been his strong suit.
数学一直是他的强项