美朝工作层级会议破裂原因何在?

North Korea is continuing to develop its nuclear weapons program, a UN watchdog says. Source: AAP
美国与北韩代表团就核问题重启会谈的工作层级磋商以破裂收场,北韩代表金明吉指责美国并没有改变一贯的思维和态度,但美国就有相反说法,表示两国代表有非常好的讨论,究竟是什么原因导致破裂?请听曾小碧报道。
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North Korea is continuing to develop its nuclear weapons program, a UN watchdog says. Source: AAP