Until this year, Pyongyang has denied U.S. accusations it possessed a covert HEU, or highly enriched uranium program, in violation of previous agreements.是什么意思_Until this year, Pyongyang has denied U.S. accusations it possessed a covert HEU, or highly enriched uranium program, in violation of previous agreements.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句