They want to prevent a spillover of refugees into neighbouring territories.他们想要防止难民潮蔓延至邻近地区。Countries overwhelmed by the human tide of refugees want safe havens set up at once.那些不堪难民潮困扰的国家希望马上建立安全区。The refugee flows alone would be a huge upheaval.单是难民潮问题就会带来很大的动荡。