生物可以降解的物质

CNN 2010-03-08

Dana joins us now live from Washington. So, Dana, you know, what is your take here? Is this typical political theater of someone's who's not going to be re-elected? Or is it a true sign of growing rage over the fact that we're spending money that we

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[0:0]strip structure studio脱光衣服，剥去结构，构造画室，摄影棚 [0:31.9039]stuff style submerge submit原料，材料风格，文体，样式潜入水中，淹没屈服，听从 [1:16.6271]subsequent substance substantial substitute随后的，后来的物质，实质，要旨可观

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自然探索

SSS 2009-04-02

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average particle size

Birthday of Martin Luther King, Jr.