很久以前,山西阳城一带有一个农民,其祖祖辈辈都与土地打交道.一次,这个农民耕作累了,靠在地头的一棵大树上休息,无意中看到一只穿山甲在打洞.一种强烈的好奇心,驱使他走近细心观察起来.穿山甲的鼻子的尖端很有特点,在这上面有许许多多分散的突出点,穿山甲就是靠这些分散的突出点打洞的.这个农民恍然大悟,心想:如果用多点接触代替线、面接触的办法,以阻力最 Long ago, there was a farmer in Yangcheng, Shanxi, where his ancestors had dealt with the land. Once, the farmer was tired of farming, resting on a big tree in the ground and accidentally seeing a pangolin in his hole. Strong curiosity, driven him closer look carefully observed.Pin nails nose is very characteristic of the tip, there are many scattered points above this point, pangolin is to rely on these scattered highlight the hole.This farmer suddenly realized, Thought: If you use more contact instead of line, surface contact approach to the most resistance