序曲一个月前,表弟从乡下给我送来了一只鳞片张得很开的松果,我没有在意,顺手把松果扔进了一只装有水的杯子里。几天后,我又去看它,没想到,松果的鳞片由松到紧了。这是怎么一回事？我赶紧去查科学书,嘿!还真找着了。书上说,在干燥的日子里,松果的鳞片会打开；相反,如果松果的鳞片紧闭,则表示即将下雨。为什么呢？我赶紧往下看：“这是因为空气干燥时,鳞片会收缩；当空气潮湿时,鳞片吸收了水汽变得柔软,松果自然就恢复原形了。”原来是这么一回事啊!我恍然大悟, Overture a month ago, cousin sent me from the countryside a very open scales of pinecone, I did not care, and easily thrown into a cup of water with pine nuts. A few days later, I went to see it, did not expect, pine cone scales from loose to tight. This is how the same thing? I quickly check the science book, hey! Really find it. The book says that on dry days, the scales of the pine nuts will open; conversely, if the scales of the pine nuts are tight, it means it is about to rain. why? I quickly look down: “This is because when the air is dry, the scales will shrink; when the air is wet, the scales absorb the water vapor becomes soft, pine nuts will naturally return to its original shape.” So it is so !, I suddenly realized ,