That's the only single word that can define being the eldest sister in the family.

那是唯一一个能定义在一个家庭中姐姐的字眼。

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It's not every film that can define a character by the way he packs and checks his luggage.

不是每一部电影都可以通过收拾和整理行装的方式来刻画角色的性格。

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There are many factors that can define the middle class in a society, such as money, behaviour and heredity.

有许多因素可以定义的中产阶级的社会中，如金钱，行为和遗传。

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"When you are going three miles a minute, it can be hard to clearly define that."

VOA: standard.2010.07.05

And again, we can define what that most probable radius is, that distance at which we're most likely to find an electron.

同样的，我们可以定义最可能距离，在这里找到电子的概率最大。

麻省理工公开课 - 化学原理课程节选

But something that tugs at an idea or a feeling that you really can't define or name, that is timeless.

但那些激发你某种莫名的想法或感觉的东西，却是永恒的。

关于现代美术 - SpeakingMax英语口语达人

The best photographers capture timeless moments that can define an era, or offer precious insights into the lives of the people in front of the lens.

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One of the advantages is that companies can define the goals of their systems in terms of business objectives rather than network metrics.

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Are there certain heat zones or thresholds that we can define?

FORBES: Using Data To Find The Next Gotye