His hands were rough and callused, from years of karate practice.

他的双手由于多年的空手道练习，粗糙而布满老茧。

Heavy work callused his hands.

繁重的劳动使他的双手生出茧子来。

I showed my callused hands in court.

我在法庭上展示我布满老茧手。

The long march had callused his feet.

沃尔登握了握他那长满老茧的手。

With callused hands, he showed me how to make a flute.

他用满是老茧的双手摆弄着，教我做笛子。