产业区位周期链上的再集中与初始集中是有本质区别的。

Essential differences exist between re-centralization and original centralization on the life cycle chain of industry location.

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简言之，管理并不是一种职业，同时管理也永远不可能成为一种职业，而以上的分析中也能看出管理和职业之间是有本质区别的。

In short, management is not a profession. Moreover, management can never be a profession, and policies predicated on the assumption that it can are inherently flawed.

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There's a volume, there's a temperature, than the pressure here. There's other volume, temperature and pressure here, corresponding to this system here.

温度等状态函数有本质区别，这个状态有一组，确定的体积，温度与压强。

麻省理工公开课 - 热力学与动力学课程节选

We basically are different, but we all have the same kinds of needs.

我们虽有本质区别，但我们有共同的需求。

麻省理工公开课 - 媒体、教育、市场课程节选