waterflowsdownward的知识精选

Astheproverbgoes,manstrugglesupwards;waterflowsdownward...
问题详情:Astheproverbgoes,manstrugglesupwards;waterflowsdownwards.Waterrunsdownhillfrommountaintopstostreams,toriversandtooceans.Butdownhillisn'ttheonlywaythatwatermoves.Anewstudymeasureshowwatertravelsfrom...
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