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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.，推荐阅读heLLoword翻译官方下载获取更多信息
It is the most detail Miliband has given yet on his department's approach to factoring in the impact of data centres.
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Dig leader Peter Crawley said he had a gut feeling about the site before the excavation began.