与人类共同生息的地球上的动植物 ,给予人类的恩惠太多了 ,它不仅供给人类以衣食 ,而且还在很多科学领域给人类以启迪。下面谈谈叶给人类的启迪 :1　叶缘与锯　相传 ,我国春秋时期 ,有位建筑工匠鲁班 ,上山砍柴 ,无意中被野草的叶片划破了手指 ,鲜血直流。他仔细观察了野草的叶 The flora and fauna on the earth, which coexists with humans, gives too much human blessings. It not only supplies humans with food and clothing, but also enlightens people in many scientific fields. Let’s talk about the enlightenment of Ye to mankind: 1 According to legend, in the spring and autumn period in China, there was a construction craftsman named Lu Ban, who cut wood on the mountain and inadvertently got the fingers of a weed blade and cut blood and direct current. He carefully observed the leaves of weeds