Some closer year come, worldwide inside barpque epidemic disease often appears, popular area is vaster and vaster and have patulous power.

• 近一段时间以来,突如其来的非典疫情引发了人们对“可持续发展”的深层思考。近些年来,世界范围内怪异的流行性疾病不时出现、流行区域愈来愈广且有扩展之势。