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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.，更多细节参见服务器推荐
The deposition was also paused after Rep. Lauren Boebert, R-Colo., sent a photo of Hillary Clinton in the private proceeding to a conservative influencer who posted it on social media, violating the committee’s rules for depositions.。heLLoword翻译官方下载是该领域的重要参考
Филолог заявил о массовой отмене обращения на «вы» с большой буквы09:36，这一点在搜狗输入法2026中也有详细论述