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 ...
这话对不住我亲爱的历史老师,不过有谁需要历史课呢?With apologies to my old history teacher, who needs history lessons?今天历史课指定的作业是什么?What is today's assignment in history?教师利用城堡图画讲解历史课.The teacher illustrated the history lesson with pictures...
A sliver of light showed under the door.门底下现出一丝亮光。There was only one sliver of light in the darkness.黑暗中只有一点零星的光亮。She was wearing a sliver fox fur across her shoulders.她肩上披了一件银色的狐皮衣....