The theory of modern medical health care attaches importance to the mental hygiene and maintain the functions of brain, for the operations of the body organs need to be directed by the brain.

现代医学保健的理论很注重心理卫生，注重保持头脑的功能，因为人身一切器官内脏的运作，都是靠头脑指挥的。

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If everyone fully understands and adheres to the contract of the functions of a particular DLL, shouldn't updating that DLL in theory not break any code?

假如每个人都完全理解并且遵循特定dll的功能契约，那么在理论上，是否不应该升级dll，以避免对某些代码的破坏？

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Then we introduce the basics of the theory of frames, which intuitively correspond to over complete, non-orthogonal systems of basis functions.

然后我们将完整的介绍架构理论的基础，亦即直观符合非正交系统的基本功能。

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And specifically, MO theory is the quantum mechanical description of wave functions within molecules.

特别的，MO理论是,分子内波函数的描述。

麻省理工公开课 - 化学原理课程节选