单词：pulp fiber classifier
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Technology Report - How to Do It: Making Paper by Hand This is the VOA Special English Technology Report. The earliest process of making paper was done almost five thousand years ago in Egypt and the Nile Valley. In those days, paper was made from st
2011年VOA慢速英语(七)月
That'true. monarch butterflies lay their eggs on milkweed plants.The caterpillars feed on milkweed, from which they extract substances called cardenolides, a type of chemical that can cause heart arrhythmia. This toxin doesnt affect the caterpillars
英语时差8，16
Remember how stiff jeans used to be? In the olden days, even sitting down or climbing stairs was hard. But these days jeans can be skintight yet surprisingly comfortable. The secret is the spandex, which they add to denim to make it stretchy and comf
轻松英文阅读
Scientists in Brazil are turning fruit fibers into car parts. At a recent meeting of the American Chemical Society, the researchers described their work in making the next generation of automotive parts made from natural fibers from bananas, pineappl
VOA标准英语2011年(四月)
[00:02.17]Unit 20 New Frontiers Culture Corner [00:06.79]Ancient Chinese Inventions [00:09.71]Paper making [00:11.18]The ancient Chinese invented [00:13.43]and were using paper about 2000 years ago. [00:17.36]Early paper in China was made [00:19.20]f
北师大版高中英语模块7(选修)
Pulp from Plants Makes Packaging More Earth-Friendly 植物纸浆让包装更环保 The average American throws away about 84 kilos of plastic every year. Much of that ends up in the ocean, according to the marine research group Algalita. Almost half
2016年VOA慢速英语(九)月