科研之友
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<正>冬天的美国国家公园有着与平日里截然不同的美丽景象。这时人烟稀少,皑皑的白雪为万物披上了银装,动物们也纷纷下山寻觅食物……Best Wildlife Viewing: Yellowstone In Yellowstone, winter is one of the best times of year for wildlife viewing and photography:Bison, elk, moose, mule deer, wolves, and coyotes come down from the snowy peaks and into the
