单词：activated sludge method
单词：activated sludge method 相关文章
By Mario Ritter Broadcast: October 28, 2003 This is Steve Ember with the VOA Special English Agriculture Report. Farmers have long put animal waste on their fields. They may also use human waste. Mode
VOA2003（下）-农业与经济
You want an example of something toxic? Take a look over my shoulder here. That red sludge spilled out of a reservoir at an aluminum plant on Monday. This happened in the European nation of Hungary. This stuff is toxic. Around 250 people had to leave
CNN2010年(十)月
An official in Hungary says a toxic sludge spill, which has killed four people, has reached the edge of Europe's second longest river, the Danube. Officials say the sludge has reached the Danube, one of Europe's longest rivers. An official also told
VOA标准英语2010年(十)月
本期内容： Dwayne Johnson has thanked fans for their support after he opened up about his battle with depression. The 45-year-old discussed his mother's suicide attempt and a period he described as the worst time of his life in an interview with
夏说英语新闻晨读
1. New Jersey Senator Frank Lautenberg says he will introduce legislation requiring colleges to adopt a code of conduct that prohibits bullying and harassment. The Democrat made the announcement Wednesday at a town meeting in memory of 18- year-old T
美联社新闻一分钟2010(十月)
本期内容： Researchers in the US have been investigating the final journeys taken by disposable contact lenses. They found 15-20% of US users simply flick these fiddly lenses down the drain via the bathroom sink or toilet. The study suggests tha
夏说英语新闻晨读