心脏是血液循环的动力源，心肌细胞线粒体在此过程为细胞活动提供能量。
Heart is the power source of hemocircular, and the mitochondria of cadiocyte provided energy for cytolergy in this process.
人类对心脏的了解是从某个事件开始的。 直到1615年，英格兰皇家物理学家威廉.哈维的研究首次证实了心脏和血液循环是有关系的.
It wasn't until 1615 -- and the study of the heart by England's royal-court physician William Harvey -- that a connection was made between the heart and the circulation of blood.
“根据地图的十分形象的比喻， 西史匹瑞亚 是“整个心脏血液循环的中心”，铁道系统是大动脉，纽约是“商业之子起源的脐带”。”
Its metaphor makes West Superior ‘the center of cardiac or heart circulation’; the railways become major arteries; and New York is ‘the umbilicus through which this man of commerce was developed’.
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