事实上，生产力的概念本身就是时钟的副产品：一旦工作表现与统一的时间单位可以联系起来，工作就永远都不一样了。

Indeed, the very notion of productivity is a by-product of the clock: once one can relate performance to uniform time units, work is never the same.

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其次，总结了众多学者的研究成果，界定了核心竞争力的概念。

Secondly, many scholars summed up the study results, defined the concept of core competence.

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我们在商学院里学过期望值的概念，这是一个非常有影响力的概念。

We're taught in business school the idea of expected value, and it's actually a very powerful idea.

youdao

There are many kinds of work. There's electrical work, take the motor, you plug it into the wall, electricity makes the fan go around, that's electrical work. There's magnetic work.

我们复习一下大一,学过的功的概念：,物体在力的作用下，运动了一段距离。

麻省理工公开课 - 热力学与动力学课程节选

You have an intuitive definition of force.

你只是对力有个大致的概念

耶鲁公开课 - 基础物理课程节选