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科技苑【20150423】看点介绍
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科技苑20150423集剧情：第20150423期
为啥机械化普及有人偏偏还用牛耕？为啥看似平整的水田却充满了隐患？为啥它似船非船却叫它“水上漂”？它又是如何从深陷的坑里自己爬出来？《科技苑》为您讲述。rnrn
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