单词：contravariant Hom functor
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Noam Chomsky is an American author, lecturer, linguist, philosopher, and political commentator. He is a top professor of linguistics at the Massachusetts Institute of Technology (MIT). His ideas completely changed teachers understanding of how we lea
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Today's topic is who versus whom. I've received three requests from listeners to cover this topic. Here's Noreen: I just wondered if possibly in one of your episodes you could go through the use of who versus whom. I think that's a common misundersta
英语语法 Grammar Girl
Grammar Girl here. It was almost exactly a year ago when I did the first show about who versus whom. In that show I only covered the simple cases, and lately I've been getting questions that made me think I should delve deeper into the topic. So toda
英语语法 Grammar Girl
BERLIN, Dec. 19 (Xinhua) -- German international and Bayern Munich's offensive all-rounder Thomas Mueller extended his running contract until June 2017, the club said in an official statement on Wednesday. Bayern Munich youth product Thomas Mueller e
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Michael Kitchen The head of the United Nations' refugee agency says security in Afghanistan is still inadequate and is asking the international community to increase its presence in the country. U.N.
VOA2004（上）--各类新闻
By Jeff Feuer Alexandria, Virginia 18 February 2008 Every year on the third Monday in the month of February, the United States observes what is known as President's Day as a celebration to honor America's first president, George Washington, and the 1
VOA常速英语2008年（二月）