倒霉,又是下雨天!稀里哗啦的就像拧开了水龙头。每天出门都得带伞不说,踢球也只能泡汤。如果一场雨不像现在这样,淅淅沥沥地下个没完没了,而是全部汇集成很大很大的一滴落下来,不就很快能雨过天晴了?首先,这滴雨有多大?我们需要知道一场雨等于多少水从天上落下来。如果雨水不渗入泥土,在一块边长为100千米的方形区域里,一场暴雨在这里可以积满7厘米深的水。刚刚没过脚面而已。可是这个方形的面积有6个上海市区那么大。 Unlucky, it is a rainy day! Sprinkling like a faucet. Have to go out with an umbrella every day, playing only bathing. If a rain is not like the present, the endless streams of endless, but all together into a big big drop down, do not soon be able to get it sunny? First of all, this drop of rain how much? We need to know how much rain is equal to how much water falls from the sky. If the rain does not penetrate the soil, a heavy rain can accumulate 7 centimeters of water here in a square 100 km long. Just barefoot it. However, this square has 6 square meters in Shanghai's downtown area.