第一辆自行车发明者英语作文。60字

第一辆自行车发明者英语作文。60字

Lu about was born in this surname 507 BC to lose, name class. Because he is LuGuoRen, so people milnwood lu. Some books for or to lose a writing autumn plate. He is engaged woodworking work. When people to make trees to become already flat and smooth board, still do not have what good method. Lu in practice watched, imitate biological form, invented a lot of woodworking tools, such as saws, a plane, etc. How is the invention saws lu? According to legend once he into deep cut trees, carelessly, hand was a kind of grass leaf blade, he ripped off lightly touched, originally leaves both sides have 8-cm-long teeth, and his hand was these small teeth ripped, he also saw in a tree on there is a important weeds locust, two big BanYa also lined by many small teeth, so can quickly grinded blade. Lu from these two things got a inspiration. He thought, if such dentate tools, isn't also can quickly sawed through trees! Hence, he after many tests, finally invented the sharp saws, greatly improving the working efficiency