He flexed his stiff arm slowly.

他慢慢地弯曲他那僵硬的手臂。

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Physical expression will be limited and stiff, with few arm and hand movements.

肢体语言很拘束，僵硬，手臂和手不怎么动。

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As they traveled day after day, his right arm began to feel stiff.

当他们一天一天的行走，他感觉到他的右手臂开始僵硬。

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