To rigidly adhere to theory, rules, or doctrines without considering objective reality or practical circumstances; to be dogmatic and impractical.
在处理实际问题时，我们不能像郑人实履那样，死守教条，而要灵活变通，才能找到最佳解决方案。
When tackling practical problems, we shouldn't be like the Zheng person buying shoes, rigidly sticking to doctrines; instead, we must be flexible to find the best solutions.
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