单词：rice husk ash
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This is Scientific American 60-Second Science. I'm Cynthia Graber. This will just take a minute. The fridge is one of your home's biggest energy hogs. Better insulation can make refrigerators much more efficient. And a panel encasing a vacuum is one
Scientific American(五)月
Some of India's most remote farming villages are beginning to see sundown in a new light, now that they are able to convert an abundant crop into electricity. Remote regions are prime examples of what people describe as old India - parts of the count
VOA标准英语2011年(三月)
Lesson 63 The Useful Cocoa-nut 第63课 有用的椰子 Cocoa-nuts grow in clusters at the top of a palm-tree which is found in most hot countries. This palm has a slender brown stem, sometimes from sixty to ninety feet high, without branches, but be
英国学生科学读本
The fridge is one of your homes biggest energy hogs. Better insulation can make refrigerators much more efficient. And a panel encasing a vacuum is one of the best insulators known. But vacuum-insulated panels are too pricy for widespread use. Enter
60秒科学
It's excellent.But I can also get something back. 真是太棒了 而且我还能把东西传回去 Does you know about that.Some coconut from California. 你们知道吗 加利福尼亚的椰子汁 One second, please. Here we go. Makes it come in. 等
艾伦脱口秀
Longer and harder work than I thought. 比我想象得更难 更漫长 But we didn't get eaten by a shark,so it's good news. 但是我们没有葬身鲨鱼腹 还算是好的 It's amazing. You get a sudden surge of adrenaline.Okay, good job. Let's go
荒野求生