立彬の日本語
422--[tbd]
畳の上の水練， たたみのうえのすいれん
1. useless book learning, knowing the theory but being unable to put it into practice, practising swimming on a tatami mat
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コンピューターのマニュアルを読むだけでは所詮畳の上の水練だ。
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Just reading a computer manual is like practicing swimming on dry land.
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