"工欲善其事，必先利其器" -- 《论语·卫灵公》
"Never trust an aircraft designer who refuses to play with model airplanes, and never trust an economic pundit who refuses to play with model economies." -- Paul Krugman
"工欲善其事，必先利其器" -- 《论语·卫灵公》
"Never trust an aircraft designer who refuses to play with model airplanes, and never trust an economic pundit who refuses to play with model economies." -- Paul Krugman
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