Ecologists argue that the benefits of treating sewage with disinfectants are doubtful.生态学家认为用消毒剂处理污水是否有益值得怀疑。The ecologists say that is a very productive kind of waterfront.生态学家们认为那儿是一块非常丰饶的滨水区.In the opinion polls the e...
In the opinion polls the ecologists reached 20 per cent.在民意调查中，自认是环境保护主义者的人达到了20%。The ecologists say that is a very productive kind of waterfront.生态学家们认为那儿是一块非常丰饶的滨水区.Flower ecologists have distinguished the wind pollina...