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 ...
我真的非常抱歉，我得走了。I do hope you'll forgive me but I've got to leave.“我们俩在同时讲话。”——“噢，抱歉。”"We're all talking at the same time." — "Yeah. Sorry."嗯，很抱歉，我以为你是法国人。Hum, I am sorry but I thought you were French....
他十分小气,连住宿都不愿给来访者安排.He would not offer a churlish roof to his visitors.他很小气,不肯捐款.He's too mean to make a donation.你这样说未免太小气了.It is small of you to say so....
周期性的局部地区的灾变降低了种群的数量.Periodic local catastrophes reduce populations.最著名的灾变论的对立理论就是渐变论.The most popular alternative to catastrophism is the gradualistic approach.即便当我还是个孩子的时候, 我会做核灾变的噩梦.Even as a kid, I had nightmares of n...