求翻译：400O年前，一个偶然的发现启发中国人发明了伞。在倾盆大雨中，有个孩子顶着一张荷叶挡雨。可是，凹面向上的荷叶积了不少雨水，渐渐顶不住了。孩子灵机一动，把荷叶翻过来扣在头上。一顶凸面朝上的伞形帽出现了。人们发现，伞形的东西有挡雨的作用，于是伞便应运而生。是什么意思？

400O years ago, an accidental discovery inspired the Chinese invented the umbrella. In the pouring rain, rain has a child that there's a Lotus leaf. However, the Lotus Leaf has accumulated a lot of rain on the concave face, getting to withstand. Kids inspire, head over to buckle in the Lotus leaf. A convex bevel on Hat appeared. People found out that the umbrella of what rain effects, and umbrellas came into being.