二者之问是源和流的关系，是从渐变到突变的医展，是由量变到质变的必然。
The relation between the two is the development from gradual transformation to mutation, as well as the inevitability from the quantitative to qualitative changes.
二者之问是源和流的关系，是从渐变到突变的医展，是由量变到质变的必然。
The relation between the two is the development from gradual transformation to mutation, as well as the inevitability from the quantitative to qualitative changes.
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