It is easy to put something into practice, but difficult to fully grasp its underlying principles or true meaning.
学习一项新技能，很多人觉得操作很简单，但要深入理解其背后的原理，才能真正做到“行易知难”。
When learning a new skill, many people find the operations straightforward, but truly grasping the principles behind it illustrates the concept of "easy to do, hard to know."
Era:
Early Modern
Frequency:
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