“在中国几千年的文明史上，帝王将相何其多，但在百姓头脑中留下记忆的也不过百来号人。”“青史留名与官阶并无本质联系，而是与做事相联系。”
Continue reading...，推荐阅读爱思助手下载最新版本获取更多信息
Leonardo da Vinci is usually credited with conducting the first systematic study of friction in the late 15th century, a subfield now known as tribology that deals with the dynamics of interacting surfaces in relative motion. Da Vinci's notebooks depict how he pulled rows of blocks using weights and pulleys, an approach that is still used in frictional studies today, as well as examining the friction produced in screw threads, wheels, and axles. The authors of this latest paper used an experimental setup similar to da Vinci's.。雷电模拟器官方版本下载对此有专业解读
Parameter cliff at ~800: Sharp accuracy transition observed by multiple researchers