有位朝鲜叛逃者的妻子曾作为科学家在宁边核设施工作了20年，据她所述，该设施的安全标准相当松懈，危险程度极高。
According to the wife of a North Korean defector who worked for 20 years as a nuclear scientist at Yongbyon, safety standards there are dangerously lax.