单词：natural purification process
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Explorations - Great Thinkers: Charles Darwin and Evolution STEVE EMBER: Welcome to Explorations, in VOA Special English. I'm Steve Ember. This week, Barbara Klein and I tell about one of the most influential thinkers in science history. Charles Darw
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A man enters a barbershop for a shave. While the barber is foaming（涂上泡沫） him up, he mentions the problems he has getting a close shave around the cheeks. I have just the thing, says the barber, taking a small wooden ball from a nearby dra
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我所提倡的自然学习法只有三条基本原则。 I advocate this natural learning method with three basic principles. 第一、学习英语应该遵循由简入繁、由易到难、由粗至细的原则 I. Learning English should follow the
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