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The rotation construction of two sections of a giant super-tonnage bridge on the Shantou-Kunshan highway in China's Guangdong Province has been completed on Friday morning. The two sections of the bridge also span across the Beijing-Guangzhou high-sp
2018CRI中国国际广播电台
北京奥运28大项 参与，竞争，分享，进步 Water Polo 水球 The competition shall be between a maximum of eight teams selected in the following manner: automatically the first three teams from the preceding World Championships and one team from the Contin
奥运28大项比赛
Galactic Rotation 银河系自转 Astronomers calculate there is ten times more matter in our Milky Way galaxy than we can actually see. Discover how the orbital motions of stars in the galaxy reveal dark matter -- on today's Earth and Sky. JB: I'm Joel
(科普英语)Earth and Sky
Speed and capacity 速度与生产能力 A:OK, so this is our newest machine. It was only installed last year. A:好，这是我们最新的设备。去年刚安装的。 B: What's the running speed of the machine? B:这个机器的运行速度是什么
职业技术英语口语
Likewise, light travels at its maximum speed through a vacuum-the interstellar highway-but it slows down when it enters air, water, or some other medium. Through air, light moves a hint slower: forty miles-per-second less than its maximum speed. Thro
英语时差8，16
世界上跑得最快的是什么？答案是光速。它每秒能跑186,280英里。因为即使在太空中，光速也大致相同，所以光年也就用于描述不同星球之间的距离。记住了哦，光年是距离单位，不是时间单位
英语听力文摘 English Digest