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老马认识路。比喻有经验的人对事情比较熟悉。
[an experienced man knows the ropes;knowledge of a veteran; an old hand is a good guid as an old horse knows the way; the devil knows many things because he is old] 比喻富于经验堪为先导 老马识途添病骨,穷猿投树择深枝。——清· 黄景仁《两当轩集》