单词：plutonium phosphate
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[00:00.00]Lesson Eight [00:02.80]Text [00:05.43]How I Designed an A Bomb [00:09.59]in My Junior Year at Princeton John A . Phillips and David Michaelis [00:19.15]The first semester of my junior year at Princeton University is a disaster, [00:27.30]an
自考英语综合二下册 课文+单词
A former nuclear weapons center is now a wildlife refuge. 美国一处前核武器工厂现在成为了野生动物保护区。 The United States Fish and Wildlife Service officially opened the Rocky Flats National Wildlife Refuge in Colorado last we
2018年VOA慢速英语(九)月
pH - a measure of how acid or alkali a solution is. As the pH gets lower, the solution is more acid. At a pH of 7 the solution is neither acid nor alkali. pH is the inverse of the logarithm of the con
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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Batteries of the future need to deliver more energy, and they need to be smaller. Researchers at MIT think they have developed a technology that can, a
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A Closer Look at the Iran Nuclear Deal 仔细复盘伊朗核交易 World powers have been working for years to limit Irans nuclear activities. But news reports often fail to provide details of the nuclear negotiations. Today we explore some of the is
2015年VOA慢速英语(七)月
And what happened was -- when we get in to chapter two of the nuclear threat era, which started back in 1945. 而现实是当我们进入1945年开始的核威胁时期的第二阶段 Chapter two starts in 1991. 第二个阶段是从1991年开始的
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