Government chiefs are worried that the refugee problem might spill over from neighboring countries.政府的长官担心邻国的难民问题会蔓延开来。The refugee problem has now reached immeasurable proportions.难民问题已经到了无法估量的程度。Later Mr Moi raised the vexed question of refugees.后来莫伊先生提出了那个让人头疼的难民问题。