一个人只有一个心脏，却有两个心房

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 there are two atrium. A live happy; A lived sorrow. Don't laugh too loudly, or you will wake the flank of sorrow. -