单词:prevention of pollution by sewage
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Unit 17 Saving the Environment271 拯救环境 比起消除真正的污染,当前加强对于环境保护重要性的认识,其意义还要深远得多。我们太晚才认识到,当我们在生产﹑规模﹑速度和发展这些方面取得成就的时候,生活条件已大大恶化 The effort to save the environment derives
新编英语教程第四册unit11_3_Crime_Prevention
污染物 aerosols气溶胶 / 气雾剂 agricultural wastes农业废物 asbestos石棉 commercial noise商业噪音 composite pollution混合污染 dioxins二恶英 hazardous substances危险物质 hazardous wastes危险废物 heavy metals重金属 h
AS IT IS 2016-09-06 Water Pollution Puts Over 300 Million at Risk 超过3亿人面临水污染风险 More than 300 million people in Africa, Asia and Latin America are at risk of life-threatening diseases such as cholera and typhoid. The reason: Poll
DON GONYEA, HOST: Port-au-Prince, Haiti is a city of more than 3 million people with no sewer system. International donors have spent millions of dollars on infrastructure meant to help the situation. But a multi-year plan to build sewage treatment p
物理学 statics 静力学 motion 运动 inertia 惯性 gravitation 引力 relativity 相对 gravity 地心引力 vibration 震动 medium (media) 媒质 frequency 频率 wavelength 波长 pitch 音高 intensity 强度 echo 回声 resonance 回声,洪