Mercury, in association with The Independent, is sponsoring Britain's first major Pop Art exhibition for over 20 years.《信使报》正携手《独立报》一起为20多年来英国举办的首届大型通俗艺术展览提供赞助。Although tobacco ads are prohibited, companies get arou...
Keywords: ahazard potency of debris flow, externality, cost - benefit analysis.关键词: 土石流特定水土保持区 、 外部性 、 成本效益 分析.Pollution is considered as a form of negative externality in economic growth.摘要环境污染是经济增长过程中的“负产品”.The damage ...