Iran ' s semi - official student news agency ( i a ) says nuclear engineers have begun operating a second network of centrifuges at a uranium enrichment facility 伊朗半官方的学生通讯社说，核工程师已经在一个浓缩铀设施开始操作第二组离心系统。
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Iran ' s semi - official student news agency isna says nuclear engineers have begun operating a second network of centrifuges at a uranium enrichment facility 伊朗半官方的学生通讯社说，核工程师已经在一个浓缩铀设施开始操作第二组离心系统。
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Iran ' s semi - official student news agency ( isna ) says nuclear engineers have begun operating a second network of centrifuges at a uranium enrichment facility 伊朗半官方的学生通讯社说，核工程师已经在一个浓缩铀设施开始操作第二组离心系统。
