加星标，才能不错过每日推送！方法见文末动图 “四大力学”这种基于错误翻译外加错误理解的叫法，极具误导性。及时抛弃这个不严谨的说法而代之以准确、系统甚至深刻的理解，多少会有益于我国的物理学教育与研究事业，惠及当下与未来的物理学习者。 撰文 | ...

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By Kim Brawn, Thompson Free Library Library vibes can change faster than Maine’s weather. One minute a frenzied gaggle of ...

Commonly known as the “Santa Fe” type, it served on the Ji Tong Railway in China for twenty years until retirement and was ...