名词
中文翻译：Unknown
同义词：
['Sinus node', 'Sinoatrial node']
例句：
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1. The patient's blood pressure was elevated during the test.
病人的血压在测试期间升高。
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2. The sinus node is responsible for controlling the heartbeat.
窦房结负责控制心跳。
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3. The sinus node is a small structure located in the center of the heart.
窦房结是心脏中心的一个小型结构。