1N-COUNT [adjective NOUN]击球手 In sports, you can use hitter to say how good someone is at hitting the ball. 击球手
The Georgian, aged 19, is not one of the game's big hitters.
这位19岁的佐治亚州人并不是比赛中的优秀击球手之一。
2N-COUNT [adjective NOUN]有影响力的政客(或商界人士);政界(或商界)大人物 If you refer to someone such as a politician or a businessman as a heavy hitter or a big hitter, you mean that they are powerful and influential. 有影响力的政客(或商界人士);政界(或商界)大人物
...friendships with heavy hitters like European industrialist Carlo De Benedetti.