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https://online2.tingclass.net/lesson/shi0529/0008/8458/3121-covert.mp3

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Russia's Foreign Minister Sergey Lavrov complained to U.S. Secretary of State Mike Pompeo about the arrest of a Russian woman on allegations of being a covert agent. 俄罗斯外长拉夫罗夫就美国以秘密特工的罪名抓捕一名俄罗斯女子一事向美国国务卿蓬佩奥提出不满。

A team of researchers at the Middlebury Institute have located a suspected covert uranium enrichment plant in North Korea. 蒙特雷国际研究院的一个研究小组发现了朝鲜一个被怀疑在秘密进行铀浓缩的工厂。

好的，我们今天学习的词是covert, covert, covert ...

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