1、
A mere 15 years after its founding, it had joined the elite nuclear club.
使得中国仅仅在建国15年之后跻身于“大国核俱乐部”.
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2、
3、
4、
and seven members of something that came to be known as the "nuclear club."
有7个国家先后拥有了核武器成为了一个叫做“核俱乐部”组织的成员
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