Choosing a course to study at university is a decision with many variables.

迭择在大学学习哪些课程是一个有着许多变数的决定。

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The choice is a complicated one, with many variables, but it remains a choice.

这一选择相当复杂，有许多因素，但它依然是一种选择。

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Selecting an appropriate location for a full-network monitoring connection point is a complex topic with many variables dependent on specific network attributes.

为全网络监视连接点选择适当的位置是一个复杂的主题，因为其中存在很多依赖具体网络属性的变化因素。

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Rather, with so many variables involved in qualifying for some forms of aid, and not knowing if that aid will come in the form of a student loan or a scholarship at most universities, perhaps more families will rise up to the challenge and create cool strategies to pay for college, with or without financial aid.

FORBES: College Aid Announcements Sign of Predictable Change

With so many possible variables to consider, it makes sense to start with a clean slate and see what relationships we can tease out of the data.

FORBES: All the News That's Fit to Trade

The thinking tends to be that there are too many variables with the marathon to base the entire selection process on one race.

WSJ: Racing With No Chance of Winning