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A fellow rower might notice that his right palm is more calloused than the left.
同伴可能会注意到，马宏升的右手掌比左手掌粗糙。
youdao
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His hands were rough and calloused, from years of karate practice.
由于多年练习空手道，他的双手粗糙不平，布满老茧。
youdao
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His hands were rough and calloused, from years of karate practice.
由于多年练习空手道，他的双手粗糙不平，布满老茧。
youdao