这个曲面积分，不是同一个向量场。

OK, and that surface integral, well, it's not for the same vector field.

youdao

所以要用面积分，而非线积分。

And so it will be a surface integral, not a line integral anymore.

youdao

对于曲面积分，也已经知道如何计算。

And, surface integrals, we know also how to evaluate.

youdao

它是一个面积分，所以这里需要两个变量。

It is a surface integral, so we need to have two variables in there.

youdao

在变分方程中，只存在线积分，没有面积分。

In the variational equation, there is only line integral.

youdao

大面积分布着沙漠。

The big area distributes desert.

youdao

它的面积分布得很广，非常开阔和通风，有很多公园。

It's quite spread out, and quite open and airy, with lots of parks.

youdao

而1999年报告则没有将上述面积作为公共面积分摊。

And the 1999 report is not the area as a public space-sharing.

youdao

提出了利用动态热电偶测得的齿面闪温分布曲线计算齿面积分温度的方法。

The method of calculating integral temperature by measured flash temperature curve was put forward.

youdao

提出了利用动态热电偶测得的齿面闪温分布曲线计算齿面积分温度的方法。

The method of calculating integral temperature by measured flash temperature curve was put forward.

youdao