KELLY MCEVERS, HOST: For millions of Americans, what they flush down the toilet goes into a septic tank. Septic tanks are convenient, but sometimes they pollute our waterways. Scientists are trying to track down that pollution with help from a federa

发表于:2019-01-17 / 阅读(48) / 评论(0) 分类 2017年NPR美国国家公共电台5月

矿山回填 oil residue recuperation 残油回收 radioactive waste management 放射性废物管理 recycled materials 回收的材料 recycling 回收 reuse of materials 材料再利用 sanitary landfills 卫生填埋 sea outfall 海洋排泄口 s

发表于:2019-02-18 / 阅读(52) / 评论(0) 分类 实用英语