Ted英语演讲:太空漫旅:Phil Plait :天地大冲撞
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TED演讲之身体语言 气味背后的科学(4)
Here's how shape works in normal receptors. 这里展示的是形状是如何对通常的感受器起作用的。 You have a molecule coming in, it gets into the protein, which is schematic here, 一个分子进来,进到蛋白质里,图中所示意的就是蛋白质, and it causes this thin
美国总统奥巴马告别演讲(7)
But for all the real progress that we've made, we know it's not enough. 尽管我们取得了很多实质性的进步,但我们知道这些仍不够。 Our economy doesn't work as well or grow as fast 我们的经济体运作得不够有效、增长得不够迅速。 when a few prosper at the ex
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奥巴马演讲:Put People Ahead of Insurance Companies
Moving Forward to Put the American People Ahead of Insurance Companies Today the President made it exceedingly clear that he intends to move forward on reform to put Americans in control of their heal