中国企联、工信联盟与亿欧公司举办世界创新者年会并发布全球创新榜单|皇冠官网地址

12月6日至8日,以科学创新4.0:资源共享全球化新未来为主题的WIM2019世界创新者年会在北京召开,本次大会由中国企业联盟(全称:中国企业联盟)指导,工业和信息化科学技术成果转变为联盟(全称:工信联盟)、北京亿欧网络联盟科学技术有限公司(全称:亿欧公司)领先主办。

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双语科技百科(物理) 第39期:漏壶_皇冠官网地址

The Clepsydra漏壶The clepsydra is an instrument for time calculation in anaent China.The ancient people, upon finding that water in a pottery often leaked out drop by drop, made a pottery kettle with a small hole. Water filling the kettle would leak out through the hole, and another kettle was used to collect the leaking water. A marked arrow, like the dial of todays watch, was placed inside the second kettle through the hole of the kettle lid, floating on top of the water with the support from a bamboo flake or a wooden plate. The keftle was known as an “arrow kettle”.As the water level increased, the arrow also moved upwards,and people could know the exact time through looking at the marks on the arrow.漏壶是中国古代的一种计时工具。

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