uppercut

Ben caught him on the chin with an uppercut.

用上钩拳打中他的下巴。

Blows struck with the fist (uppercut, haymaker, jab) are most effective when the user has had considerable experience in boxing and its allied sports.

当使用者在拳击以及相关运动方面相当有经验的时候，用拳打击（上钩、重摆、刺拳）能达到最佳效果。