Ukraine's President is calling for humanitarian corridors to be open in the country's east to allow civilians to escape fighting between Ukrainian forces and pro-Russian separatists. VOA's Gabe Joselow reports. Ukrainian President Petro Poroshenko issued a statement Tuesday calling for security forces to provide protective corridors to residents in order to avoid new victims in the areas where counterinsurgency operations are taking place. Ukrainian armed forces have stepped up a so-called anti-terrorist operation in the Donbass region of eastern Ukraine the heart of a pro-Russian separatist uprising.______________________ 乌克兰总统呼吁在本国东部地区开通人道主义通道,允许平民通过该通道躲避发生在乌克兰军队与亲俄分离主义分子之间的战争.VOA的加布`邹斯隆报道.乌克兰总统佩特罗`波罗申科要求安全部队为居民提供保护通道,以避免该地区实施的反暴乱行动造成新的伤亡.乌克兰武装部队在乌东部顿巴斯地区加紧进行所谓的反恐行动,而该地区是亲俄分离主义分子起义的中心区域._____________________