This article is related to a calculating method of atomic ionization cross section on K - shell when bombarding a nucleartarget with electron.
介绍了利用电子轰击核靶原子K壳层电离截面的一种计算方法。
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Gradually other nuclear powers realized that the only target in America was Washington. The more astute saw the writing on the wall and slipped away from the former capital city.
其他核国家逐渐认识到，他们在美国的唯一目标是华盛顿，预见到危险前景的人们开始逃离这座曾经的首都。
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The target may have been the centrifuges at its nuclear refinery at Natanz.