1、
It is necessary to enrich the fuel by increasing the percentage concentration of uranium-235.
必须提高铀235浓度的百分比,使燃料浓集.
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2、
The ratio of those causing fission to those escaping increases as the mass of uranium-235 increases.
随着铀235大量增加,导致那些分裂的对那些逃脱的比率增加.
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3、
4、
5、
However, nuclear power reactors need uranium with U-235 at a concentration of 30 in 1,000.
但核发电厂的反应堆所需要的铀,起码得把铀235富集到千分之三十.
英汉非文学 - 科技
