求翻译：*.* 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 是什么意思？

*.* A person has only one heart, there are two atria. A living joy; a lived a sad. Don't laugh too loudly, or you'll wake up the sad Shang Jin region, next to.