FormostAmericans,acleanglassofwaterisjustamatterofturni...
問題詳情：FormostAmericans,acleanglassofwaterisjustamatterofturningonafaucet（水龍頭）.Butformanyoftheworld’spoorest,it’shardtoget. OnWednesday,theUnitedNations(UN)markedWorldWaterDaybytryingto...