这使师资匮乏的问题更为严重.This makes the teacher shortage even more critical.自然资源匮乏的唯一经济判断是成本, 而不是实物的稀缺.Costs, not physical scarcity, are the only economic test of a shortage of natural resources.失业和匮乏的幽灵一直在对他们作祟是不能否认的.There is no d...