名词
中文翻译：Unknown
同义词：
['primary artery', 'primary vessel']
例句：
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1.The primary arcus of the heartis responsible for pumping blood throughout thebody.
心脏的初级动脉负责将血液泵送到全身。
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2. The primary arcusof the brain is responsible for controlling movementand balance.
大脑的初级动脉负责控制运动和平衡。
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3. The primary arcusof the eye is responsible for focusing lightonto the retina.
眼睛的初级动脉负责将光线聚焦到视网膜上。