石头似乎是大地上最不起眼的东西，到处都是，却从来不能引起人们的注意。我们形容一个人呆板、木讷，常会说他“呆头呆脑的像块石头”。其实，石头也不全是“呆头呆脑”，毫无特色的呢，石头的性能千变万化，石头里的学问也十分丰富。有一些石头非常奇特有趣，甚至让人觉得不 Stone seems to be the least visible thing on the earth. It is everywhere, but it never attracts people’s attention. We describe one person as dull and dull, and often say that he is “head-to-head like a stone.” In fact, the stones are not all “heady”, there is no characteristic, the performance of the stone is ever-changing, the knowledge in the stone is also very rich. Some stones are very peculiar and interesting.