![Astheproverbgoes，manstrugglesupwards；waterflowsdownward...]( "Astheproverbgoes，manstrugglesupwards；waterflowsdownward...")
- 問題詳情：Astheproverbgoes，manstrugglesupwards；waterflowsdownwards．Waterrunsdownhillfrommountaintopstostreams，toriversandtooceans．Butdownhillisn'ttheonlywaythatwatermoves．Anewstudymeasureshowwatertravelsfromcountrytocountryforhumanconsumption．Thisflowisn'tt...
- 14550
中文谷