* ]8 i5 A- G5 _3 kTheory is when you know everything but nothing works. " y( g. q0 w% P* I! I , @: n8 l9 r% V, uPractice is everything works but no one knows why.5 p) o3 @: X+ X
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这两天的情况是:Theory and practice are combined: nothing works and no one knows why.