big hitter
noun/ˌbɪɡ ˈhɪtə(r)/
/ˌbɪɡ ˈhɪtər/
(also heavy hitter)
(informal)- a person who is successful and has a lot of influence
大人物；大腕；大亨 - They've appointed one of the industry's big hitters to the board.
他们委任了行内的一位重量级人物为董事会成员。
- They've appointed one of the industry's big hitters to the board.