The curriculum is changing and the thoughts are flowing, therefore the unchanging curriculum and the thoughts without reformation are lifeless.

课程是变化的，思想是流动的，一成不变的课程和不思变革的课程思想是缺乏生命力的。

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Therefore, "simplicity", "changing" and "unchanging" constitute three indispensable elements to Yi.

因此，《易》之“易也”、“变易也”、“不易也”也构成了《易》之三个不可或缺的内涵。

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Therefore, "simplicity", "changing" and "unchanging" constitute three indispensable elements to Yi.

因此，《易》之“易也”、“变易也”、“不易也”也构成了《易》之三个不可或缺的内涵。

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