callus
noun [ C ] uk/ˈkæl.əs/ us/ˈkæl.əs/
（尤指手或脚上的）硬茧，老茧
an area of hard skin, especially on the feet or hands
He had workman's hands which were rough and covered with calluses. 他有一双工人的手，粗糙且布满老茧。
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