Circle your answer to a math or science problem.
数学或科学问题要让答案圆满。
Well, if I take the vector field that was in the problem set, and if I do things, say that I look at the unit circle.
如果找一个这个问题中的向量场,然后我们要做的是,假设这个单位圆。
Now there is a very famous problem with this procedure known as the Cartesian circle and I want to draw your attention to the fact that it's not only a problem for Descartes.
有个非常著名的论题是关于认知过程的,称作笛卡尔循环论证,请大家注意,事实上对笛卡尔来说这并不是唯一的问题。
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