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A big question swirls around the origin of that water: Where is it coming from?
问题在于水源：这些水从哪里来？
youdao
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The origin of life on earth is a question that interests astronomers.
地球上生命的起源是个使天文学家感兴趣的问题。
youdao
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The origin of life on earth is a question that interests astronomers.
地球上生命的起源是个使天文学家感兴趣的问题。
youdao