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President's Radio Address
February 23, 2008 THE PRESIDENT: Good morning. This Thursday, Laura and I returned from an inspiring visit to Africa. In Benin and Tanzania, we met leaders who are fighting HIV/AIDS and malaria -- and
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The third one I want to talk about quickly is the progression dynamic, 第三个我想快速讲一下的是进步动机, where you have to sort of make progress, 当你不得不进步的时候, you have to move through different steps in a very granula