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发表于:2018-12-30 / 阅读(64) / 评论(0) 分类 单词解析速记

This is Scientific Americans 60-Second Science. Im John Matson, Got a minute? Imagine a pinball machine on multi-ball modeonly the balls are the size of planets. The early solar system was such a rough-and-tumble place. That chaotic environment produ

发表于:2019-01-08 / 阅读(51) / 评论(0) 分类 Scientific American(二)月

By Patricia Nunan in Kantale, Sri Lanka 24 August 2006 As many as 170,000 people in northern and eastern Sri Lanka have been displaced in recent weeks by fighting between the Tamil Tiger rebels and government forces. VOA's Patricia Nunan recently me

发表于:2019-01-13 / 阅读(102) / 评论(0) 分类 2006年VOA标准英语(八月)

By Jessica Berman Washington 22 February 2006 U.S. astronomers have discovered two moons orbiting Pluto, an icy planet smaller than our moon. Scientists found the moons while surveying the sky as part

发表于:2019-01-13 / 阅读(106) / 评论(0) 分类 2006年VOA标准英语(二月)

EDUCATION REPORT - Schools Offer Help for Students Displaced by Hurricane Katrina By Nancy Steinbach Broadcast: Thursday, September 08, 2005 I'm Barbara Klein with the VOA Special English Education Re

发表于:2019-01-30 / 阅读(75) / 评论(0) 分类 教育与新闻

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发表于:2019-02-21 / 阅读(51) / 评论(0) 分类 名人认知系列 Who Was