心脏有两个心房与两个心室，四间房。
一个人只有一个心脏，却有两个心房。
一小我只有一个心脏，却有两个心房。一个住着快乐；一个住着哀痛。
A man has only one heart, but two atrium. one of them is for the happiness, the other one is sorrow.
脊椎动物有两个心房，一个接收从身体来的血，另一个接收从肺部来的血。
In vertebrates with two auricles, one receives blood from the body and the other receives blood from the lungs.
一个人只有一个心脏，却有两个心房。一个住着快乐；一个住着悲伤。不要笑得太大声，不然会吵醒旁边的悲伤。
A man has only one heart, but two hearts. A live happy; a live sad. Don't laugh too loudly, or you will wake the sadness.
这种情况发生时，心脏的两个上心室或心房，颤动而不是有规律的收缩。
The condition occurs when the heart's two upper Chambers, or atria, quiver rather than contracting rhythmically.
两项最新研究提出两个出人意外而又暖人心房的长寿关键。
Two recent studies suggest surprising but heartwarming keys to a longer life.
两项最新研究提出两个出人意外而又暖人心房的长寿关键。
Two recent studies suggest surprising but heartwarming keys to a longer life.
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