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在人类文明的进程中，如何一种瘟疫的大爆发，都会对人类造成深而巨的伤痛和难以估量的损失而一个鲜活的个体，一群群肤色各异的民众，又是构成文明的最基本要素和文明传承的载体。还是什么能比生命更为宝贵的呢？ 历史的经验告诉我们：瘟疫的流行，非但没有毁灭人类，恰恰相反，却激发出人们不断对其抗击的勇气和智慧......
Natural language processing(NLP) requires varieties of knowledge. Linguistic knowledge such as grammar and dictionaries has been developed and shared ......
Make your very own digger, dumper and cement mixer with this highly original pack. Press out the individual vehicles and attach the magnetic wheels......
In January 2004 two NASA spacecraft, making an interplanetary trek to Mars, landed separately on the rocky surface of the red planet. By the end of th......
For thousands of years mankind has had the ambition to fly like a bird but was never able to make the dream a reality. That is, until the 20th century......
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Wine regions are attracting increasing numbers of tourists through tours, wine festivals and winery, restaurant and cellar door experiences. Presentin......
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