他们把大部分的重量放在手掌的后跟部，手掌很粗糙而且很硬。
They put much of their weight on the heels of their palms, which are rough and calloused.
最令人不安的是这种生物的爪子，粗糙的黑色利爪竟然和人的手掌一般大小，非常适合攀爬和抓握。
Most disturbing are the creature's PAWS, which are like leathery black hands... almost human in shape, with a thumb for gripping.
同伴可能会注意到，马宏升的右手掌比左手掌粗糙。
A fellow rower might notice that his right palm is more calloused than the left.
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