名词
中文翻译：伸肌
同义词：
['extensor', 'antagonist']
例句：
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1.The extensor muscles in the back are responsible for extending the spine.
背部的伸肌负责伸展脊柱。
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2. The extensors of the hand are used to extend the fingers.
手部的伸肌用于伸展手指。
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3.The extensor tendon is a strong muscle that helps you lift heavy objects.
伸腱是一根强壮的肌肉，帮助你举起重物。