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Why do certain species go extinct?
为何存在某一种类灭绝？
youdao
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Will it make a difference... if these species go extinct?
如果这些物种灭绝······会有什么差别呢？
youdao
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Will human being go extinct one day?
人类会有灭绝的一天吗？
youdao
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Will human being go extinct one day?
人类会有灭绝的一天吗？
youdao