The United States still cannot say for sure the underground detonation was a nuclear blast; the working assumption is that it was, but not very successful, the official said.

 
  • 美国现在还不能肯定的说这次地下引爆是一次核爆炸。目前的假设是它是核爆炸,但不是一次成功的核爆炸,这名官员说。
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