... 长寿命发动机 long-life engine; long-period engine 长寿命放射性 long life activity 长寿命激光器 long lifetime laser; long lived lasers ...
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high activity and long life 高活性和稳定性
Now when you look at this you see these people handling the uranium pellets. Now uranium 235 in this form is very low in activity because uranium235 has a very long half-life.
现在，当你们观察这个，你们能看到这些人,铀正在处理铀芯块，现在,在这个形式里，是活跃度是很低的，因为铀5,的半衰期很长。
Tourism, as an activity of human social life, has long history.
旅游作为人类社会生活的一项活动，有着悠久的历史。
Tourism, as an activity of human social life, has long history, currently, tourism has become a world-acknowledged rising industry.
旅游作为人类社会生活的一项活动，有着悠久的历史。当前，旅游业已经成为世界公认的新兴朝阳产业。
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