So, line integrals we know how to evaluate.
我们知道如何计算线积分。
OK, anyway, let's move on to line integrals.
再转到线积分。
Some of them compute different line integrals.
它们中的一些在做不同的线积分。
What if I add all of the small line integrals?
那如果将所有线积分都加起来呢？
I would just calculate three easy line integrals.
我只需计算三个简单的线积分。
You don't have to set up all these line integrals.
不用建立这些线积分。
Let's start right away with line integrals in space.
现在开始学习空间线积分了。
So conceptually it is very similar to line integrals.
从概念上来看，这与线积分相似。
The other one is setting up and evaluating line integrals.
另一个是建立并计算线积分。
Unfortunately, it is not quite as simple as with line integrals.
很遗憾，它的过程不像线积分那样简单。
Unfortunately, it is not quite as simple as with line integrals.
很遗憾，它的过程不像线积分那样简单。
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