n.老茧
v.结硬皮
I walked to him and took his outstretched hand which was rough with callus. 我走向他，握起他那长满老茧的手。
We have tried treatment, but the position of the callus revealed by the scan needed surgery. 我们尝试过药物治疗，但扫描显示，老茧的位置需要进行手术。
