This orbiting telescope is the largest optical instrument in space.这种轨道望远镜是宇宙中最大的光学仪器.Let's pretend we're on the spaceship orbiting round the earth!让我们假装是在沿轨道绕地球运转的宇宙飞船上!Twenty incoming flights were stacked up ...
工程师说钚可能会开始从遭腐蚀的潜艇往外渗透。Engineers said that plutonium could begin seeping from the corroded sub.危险的辐射物从钚放散出来.Dangerous emissions radiate from plutonium.钚也可以用来制成核武器.The plutonium also could be used, however, to make nuclear...
To liaise with embassies, trade boards, associations and publications.负责与大使馆, 贸易团体, 协会,其他公共团体的联络.He picked up forty of these publications and read each one of them.他从这些出版物中挑选了40本，逐一阅读。Copyright for the typographical arra...