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By Gilbert da Costa Abuja 23 May 2007 Before the deadline for petitions challenging April's presidential vote, at least seven opposition candidates have filed the necessary documents. For VOA, Gilbert da Costa in Abuja reports that the opposition is
2007年VOA标准英语（五月）
Airborne particles produced by automobile exhaust, industry and coal or oil fired power plants can cause blood pressure to rise to dangerous levels Medical researchers are finding out more about the health risks of air pollution. They say the world's
VOA标准英语2010年(八)月
托福写作中涉及到很多词汇的使用，任何情况下词汇是至关重要的，那么这些经常用到的词汇，你现在完全了解了吗?经常写作，经常修改，不断地改善自己的写作水平，注意写作中不仅仅是词
英文语法词汇
Fifty-four percent of the world's population 世界上54%的人口 lives in our cities. 居住在城市。 In developing countries, 在发展中国家， one third of that population 有三分之一的人 is living in slums. 居住在贫民窟。 Sev
TED演讲教育篇
The World Health Organization, upgrading a previous warning, said June 12 that diesel exhaust causes cancer and called for tighter emissions standards, comparing the risk of exhaust to second-hand cigarette smoke. Tuesdays announcement comes after in
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