原子时标

Without air, there would be no fire. There would be no cars or trucks, since motors need air in order to work. Without air, there would be no wind or clouds. There would be no weather, as we know it.(

发表于:2018-12-01 / 阅读(122) / 评论(0) 分类 自考英语(一)78讲

Five Minutes to Midnight 滴!答!滴!毁灭倒数计时 by Kevin Lustig The University of Chicago publishes the Bulletin of the Atomic Scientists, a magazine about topics related to nuclear technology. On the cover of every issue of the magazin

发表于:2018-12-08 / 阅读(43) / 评论(0) 分类 常春藤解析英语

The mayor of the Japanese city of Nagasaki has taken time to criticize the Japanese government's refusal to sign a non-proliferation treaty earlier this year. Tomihisa Taue made has blasted the government during the ceremony to mark the atomic bombin

发表于:2018-12-19 / 阅读(34) / 评论(0) 分类 世界各地新闻集锦

GWEN IFILL:Finally tonight, the tale of a top-secret town with a top-secret mission and the women who made history there. Ray Suarez has our book conversation. RAY SUAREZ:During the mid-1940s, thousands of young women got offers of good-paying jobs w

发表于:2019-01-27 / 阅读(35) / 评论(0) 分类 PBS访谈娱乐系列

We all know time is a construct, and right now, it's kept by the very precise tick of an international network of around 500 atomic clocks. 我们都知道时间是个复杂的概念。目前,世界上有一个由大约500台原子钟组成的网络,

发表于:2019-02-01 / 阅读(24) / 评论(0) 分类 阅读空间

Hello, I want a cab. OK. What address is it? 1120 East 32nd Street. Right. The cab will be there in a few minutes. Would you mind passing the salt, please? Certainly. What's your job? I'm an accountant. Oh! Do you enjoy it? No. I don't really like it

发表于:2019-02-26 / 阅读(92) / 评论(0) 分类 初级英语听力新版