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 ...
In practice a graduate tax is an administrative nightmare.毕业税具体操作起来不啻一场行政噩梦。All members of the association adhere to a strict code of practice.协会的所有成员都遵守一套严格的行为规范。In practice, workers do not work to satisfy their needs.事...