每日雅思词汇：朝鲜核试验　　朝鲜North Korea; 　　核试验nuclear test; 　　遥头nuclear warhead; 　　平壤Pyongyang; 　　行动过火overact; 　　严重挑衅serious provocation; 　　沉默回应muted response; 　　实施制裁impose sanctions; 　　外交边缘政策diplomatic brinkmanship; 　　引起遥社会强烈谴责spark international outrage