阿基米德洗澡时发现了什么？

A king had a new gold crown. 从前有个国王，做了顶新金皇冠。 He was afraid the crown was fake. 他担心呀，皇冠被人掺了假。 Archimedes had to find the truth. 阿基米德得帮忙，查出真相。 One day, he got into a bath. 有一天，他坐进了浴缸里。 Water spilled over the sides. 水一下子，从盆边溢了出来。 He suddenly knew how to test it. 他一下子，就想到了好办法。 He ran out shouting "Eureka!" 他跑出门，大喊着“尤里卡”。