- 問題詳情:Theairwebreatheisfreelyavailable,without71wecouldnotsurvivemorethanafewminutes.Forthemostpart,airisavailabletoeveryone,andeveryoneneedsit.Somepeopleusetheairtosustainthemwhile 72 (sit)aroundandfeelsorryforthemselves.73 breatheintheairandus...
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