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单词窦房结
例句 DEFINITIVE EXAMPLES 权威例句〔S-A node〕The sinoatrial node.窦房结美国传统〔pacemaker〕Biology A part of the body, such as the mass of muscle fibers of the sinoatrial node, that sets the pace or rhythm of physiological activity.【生物学】 起搏点:身体的一部分,如窦房结的肌肉组织纤维团,用来确定生理活动的速度或节奏美国传统
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