EPISODE · Nov 2, 2017 · 8 MIN

关于心脏

from 英语小小孩 · host 英语小小孩

我们的health课开始讲到心脏。安静的时候和运动的时候测量到的心跳是完全不一样的。我们测了自己的20秒心跳次数。你的是多少？另外一个有趣的fact，一滴血从心脏出发走完身体的一圈再回到心脏，需要多长时间呢？只需要大约心跳4到5次这么短的时间就可以......

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关于心脏

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