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More than 13,000 people in northern Senegal now have ready access to safe drinking water thanks to a collaborative project between the government, Columbia University, and a U.S. manufacturer of plastic pipe. The project is having a big impact on th
VOA标准英语2009年(一月)
Lesson 49 1.Listen to the audio tape.Fill in the blanks. [00:09.12]Write the words you hear. [00:12.67]A Smart Mother (I)Tesha is a dog,she has 6 children.She lives with Gary. [00:24.03]Gary lives in a house in the United State. [00:29.31]It is raini
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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
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2When the Lord was about to take Elijah up to heaven in a whirlwind, Elijah and Elisha were on their way from Gilgal. 2Elijah said to Elisha, Stay here; the Lord has sent me to Bethel. But Elisha said, As surely as the Lord lives and as you live, I w
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What happens when we run out of water? Over the last century, H20 has become so convenient we take it for granted. That's about to change Water is both mythic and real. It manages to be at once part of the mystery of life and part of the routine of l
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The reason that Vibrio fischeri is doing that comes from the biology. 费氏弧菌的发光现象来自生物学上的原因。 So again, another plug for the animals in the ocean, Vibrio fischeri lives in this squid. 接下来，我们再来看一个海
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