We can't define it as an exact radius in terms of the definition we might think of classically.

我们不能给它定义一个精确的半径,按照经典的图像来。

麻省理工公开课 - 化学原理课程节选

Definition or define, depending on which sort of piece of history you come from.

也就是定义或者解释,取决于你来源于那段操作历史。

麻省理工公开课 - 计算机科学及编程导论课程节选

We'll look at things--sectors say they're cheap or expensive and exploit the opportunity; but at least in terms of how I define market timing, it wouldn't be included in that definition.

关注研究资产和行业的细节,看它们是便宜了还是贵了,来发掘投资的机会,但至少在我所定义的市场时机选择方面,并不包括这些

耶鲁公开课 - 金融市场课程节选

The key here though is to stick to your general business definition without letting it totally define you.

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Among those that do, the definition varies: 55% define sustainability as the management of issues related to the environment (for example, greenhouse gas emissions, energy efficiency, waste management, green-product development, and water conservation).

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Instead of getting lumped into prefab categories of consumer, you essentially create your own custom categories that by definition create groups that you know define you (and your friends) best: biking buddies, fellow gardeners, iPhone enthusiasts.

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