< span > this article is from the popular account: < / span > < A=“ https://mp.weixin.qq.com/s?__ biz=MzUyODA3MDUwMA==&mid=2247503624&idx=1&sn=513133659582ef9f552f6e969f83bd40&chksm=fa776d03cd00e415aef576761889d9733d7f1669275239d2ff4824f3ace7923ba6247c690c19&mpshare=1&scene=1&srcid=0930sLEzESTJU11vaxeJSJ0g&sharer_ sharetime=1601420823692&sharer_ shareid=be8103098854364beb7fc7a4edcd2e7e&key=39efdee81dad7845f99aec6a0ebcc077d3a661d0eeb7674a5f2d148a808544445ef817f804d2f0aa95bb4ecec98a8853597dd79e1be80da3cb975416da17bade4138b1b541857408c1eed6bd2765707e434d25ff2c2e5c532b3bc89bc9f57177d058968697077b3196b3415da53997fd7d55ca3a1b634d76d0a2964009807d09&ascene=1& uin=MTAyMjc3MzkzNA%3D%3D&devicetype=Windows+10+x64&version=62090529&lang=zh_ CN&exportkey=AwOVnMtUh6aO36uHPE2JSqA%3D&pass_ ticket=R23Xq68wm6SdGtH8VoV0QOSljk2InFs3nwCS2%2FuCLTw4vmyp%2FGTSvxu3%2BPs7gSFA&wx_ header=0" target="_ Blank "style =" text decoration: none; "> < span > mechanical energy (ID: almost man2017) < / span > < / a > < span >, author: Wei Pang, Xu Dan, Title: visual China < / span >