Tech legend Stewart Brand on Musk, Bezos and his extraordinary life: ‘We don’t need to passively accept our fate’

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2024年12月25日 星期三 新京报

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The last element is ours.

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.

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车企们的脚步比预想中走的更快。