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关键词:纪录片 昆虫 PBS 自然 2009 美国 动物 Documentary 迁徙 自然之美
The documentary depicts monarch butterflies’ great and mysterious migration. Each year’s autumn, millions of monarch butterflies start their incredible southward migration from Canada, cross America, to Mexico. They fly above 2,000 miles to arrive the mountain of Mexico .....The film opens with cate 详情