From Washington, this is VOA News. Ukraine launches new attacks on pro-Russian separatists. Mass car bombing in northeastern Nigeria. I'm Ray Kouguell reporting from Washington. _______________________ 美国之音新闻,华盛顿报道. 乌克兰针对亲俄分裂分子展开新一轮打击.尼日利亚东北部地区发生大规模汽车炸弹爆炸事件.我是雷?寇格尔,华盛顿报道. ______________________