+ o' L) l# q" o9 _8 PTheory is when you know everything but nothing works. 6 g* w( H4 f Z8 u7 r. ^( \( D2 D. t) ~2 l! |; `# P
Practice is everything works but no one knows why.+ P4 F2 c# p! H- K2 C9 n
4 h: t9 s: i1 b7 G2 A7 v% P$ X
这两天的情况是:Theory and practice are combined: nothing works and no one knows why.