And then finally, I think the main observation is that Agile is based on practice, it's not based on theory.

最后，我认为主要的观察结论就是：敏捷开发是基于实践的，而不是基于理论的。

youdao

Ratings are based on the probability of default so they are absolute, not relative; in theory, all countries could default on their debts.

信用级别建立在违约可能性的基础之上，因此级别是绝对的而非相对而言的；理论上说，所有的国家都有可能违约。

youdao

Western medicine has a complete and logical theory, but Chinese medicine might not. It is sometimes based on experience of experiment and statistics.

中医可能不像西医那样有完整的、逻辑性很强的理论，有些方面要凭经验。

youdao

We need a higher-level theory of cancer based not on the properties of particular cancer cells, but rather based on the properties of the set of all malignant cells that could evolve.

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These projections are based not so much on economics (the theory that assets already bid up to the sky will be bid still higher, like condos in Miami) as on need.

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The story of Harold and Erica does not really illustrate a new, coherent, science-based theory of human nature.

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