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.
要在这样一群没有明显短板的对手中突围，仅凭「性价比」三个字已经很难奏效了。常规的打法，很难让零跑从这些巨头口中抢到足够的份额来实现那 105 万辆的野心。
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