名词
中文翻译：肌肉
同义词：
['muscle', 'skeletal muscle']
例句：
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1. He lifted the heavy box with great effort.
他用力地举起了那个沉重的箱子。
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2. The marathon runners warm up their muscles before the race.
马拉松跑者在比赛前热身他们的肌肉。
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3. She stretched her muscles to relieve some tightness in her back.
她伸展肌肉来缓解背部的紧张感。