单词：blood sedimentation rack
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Extreme Storms Are Extreme Eroders数天百年的效果 In 2013, a rare September storm swept across the plains of Colorado. When it hit the Rockies, it dropped more than a foot of rain in places like Boulderas much as the city sees in an entire year
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The K-T boundary marks the end of the age of dinosaurs, and the beginning of the age of mammals. KT界限层标志着恐龙时代的终点和哺乳动物时代的开端。 But does the K-T boundary really signify the absolute end of all dinosaurs? 不过
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商业农业双管齐下保护内罗毕水资源 Jane Kabugi, 68, is readying for her planting season. For five years, she was a subsistence farmer-consuming all she produces. 现年68岁的简恩卡布吉为自己的种植季节做好了准备。这
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Gibbs is perhaps the most brilliant person that most people have never heard of. Modest to the point of near invisibility, he passed virtually the whole of his life, apart from three years spent studying in Europe, within a three-block area bounded b
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美国习惯用语第858:努力想要记起某事(音频) rack one's brain 我最近发现自己还没上年纪，就已经开始健忘了。昨天，一个接受采访的专家向我推荐了一家很有介绍价值的机构。今天本想搜集点资
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