单词：scavenge system
扫气系统;清除系统
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Fur seals also feed out in the open ocean, but they are able to dive to a hundred meters or more. The patchiness of the krill requires those that live on it to spend a great deal of time searching. An
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美联社,新闻一分钟,federal,hospital,Katrina,1:The Federal Base-closing Commission agrees to close Walter Reed Medical Center, crown jewel of the US Army's hospital system. 2:Tropical storm Katrina strengthens on its way toward Florida's heavily
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