We often use a pen to write.

我们经常用钢笔写字。

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We often use it to describe some uproarious festivities.

我们通常用它来形容一些骚动的庆典。

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But today we often use broccoli and other veggies with dips.

但是现在我们通常吃椰菜和其他蔬菜的时候才用酱蘸着吃。

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One way to think about it, if we want to use a classical analogy, which often helps to give us an idea of what's going on, is the spin of an electron, we can picture it rotating on its own axis.

如果我们用一个，经典的比喻来考虑它的话，这经常会帮助我们建立起一些概念，就是我们可以把电子的，自旋想象是它绕着轴自转。

麻省理工公开课 - 化学原理课程节选

The most common one and the one we're going to use, is what's often called big Oh notation.

也就是我们即将用的方法,就是通常被叫做大O的方法，它叫大O并不是因为。

麻省理工公开课 - 计算机科学及编程导论课程节选

What we need to do is get rid of the Coulomb tag that we have - that's how we measure our electron charges - charge, and so we use this epsilon nought quite often, this permativity constant of a vacuum to make that conversion.

怎么量度电子电荷,所以我们会经常用到,这个epsilon，nought记号,这是真空中的介电常数,我们还要指出,这个介电常数。

麻省理工公开课 - 化学原理课程节选

We often use it because it's a good indicator of what's going on.

CNN: Transcript of May 'CNN Money Summit: Money & Main St.'

We often use California as an example because it was so exaggerated.

CNN: Transcript of May 'CNN Money Summit: Money & Main St.'

But here we come full cycle: we can often use the same big data we mined for our initial potential insight to in turn test that insight.

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