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。

《柯林斯英汉双解大词典》

Heavy work callused his hands.

繁重的劳动使他的双手生出茧子来。

youdao

I showed my callused hands in court.

我在法庭上展示我布满老茧手。

youdao

But is there a middle ground between angry, callused feet and the self-consciousness of sportswear commuting?

FORBES: Style

"He came off the court with a sore shoulder, his hand was callused, he has never had to work so hard, " said Donna McKennon, Max's mother, after her son lost a two-hour, 45-minute match.

WSJ: Is Tennis Getting Too Soft?

And, above all, I will ask you join in the work of remaking this nation the only way it's been done in America for 221 years block by block, brick by brick, callused hand by callused hand.

NPR: Transcript Of Barack Obama's Victory Speech