给用水的净化

VOA慢速英语2010-Development Report - Water Shortages Cont

This is the VOA Special English Development Report. The lack of clean drinking water is a major problem worldwide. The World Health Organization says more than one billion people live in areas where renewable water resources are not available. The pr

发表于:2019-01-12 / 阅读(52) / 评论(0)

2010年VOA慢速英语(四)月

2006年VOA标准英语-NASA Technology Aids Water Purification Efforts

By Paul Sisco Washington, DC 26 July 2006 watch Water Purification report Villagers in Iraq are better off today, thanks in part to NASA engineers from the Marshall Space Center in America's deep south. ------- Concern for Kids is a non-profit organ

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2006年VOA标准英语（七月）

VOA标准英语2013--Students Invent Water Purification Disc

Students Invent Water Purification Disc The lab operates like a kitchen. They add several ingredients. Then they mix, weigh, press and bake them. What's created is called a MadiDrop - a ceramic disc infused with silver. When dropped in water, silver

发表于:2019-01-14 / 阅读(50) / 评论(0)

VOA标准英语2013年(六月)

英文原版对话1000个:977 Enam's Green Concerns

Katia: So, Enam, let's talk about environmental problems of our countries. In Bangladesh, what is an environmental problem? Enam: Actually, we have a lot of environmental problems in Bangladesh but mainly I'd say the soil contamination is quite bad,

发表于:2019-02-05 / 阅读(58) / 评论(0)

原版英语对话1000个

【英语趣味课堂】问题和解决方案-Problems and Solutions

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英语趣味课堂

CCTV9英语新闻：Victims relying on water purification vehicles

Nearly 230,000 people affected by the earthquake in Yunnan have been relocated to safer areas. Longtoushan County is the worst-hit area. Two relocation sites were established there to accommodate victims. Works are now underway to repair dozens of wa

发表于:2019-02-18 / 阅读(86) / 评论(0)

CCTV9英语新闻2014年08月

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alundum extraction thimble

cbcl (child behavior checklist)