Use geometry or you need to set up for double integral of a surface.
总之，就是用几何方法或是在曲面上建立二重积分。
Now, how would we actually set up a flux integral on such a surface.
下面应该如何，在这样的曲面上建立通量的积分。
OK, and that surface integral, well, it's not for the same vector field.
这个曲面积分，不是同一个向量场。
Because a surface is a two-dimensional object, that will end up being a double integral.
由于表面是二维的，所以结果是二重积分。
And so it will be a surface integral, not a line integral anymore.
所以要用面积分，而非线积分。
It is a surface integral, so we need to have two variables in there.
它是一个面积分，所以这里需要两个变量。
Mural: Painting applied to and made integral with the surface of a wall or ceiling.
壁画：描绘在建筑物墙壁和天花板上并与其成为一体的绘画。
Granularity has great influences on the surface finish and integral cutting speed.
粒度对表面光洁度和整体切割速度具有重大影响。
Granularity has great influences on the surface finish and integral cutting speed.
粒度对表面光洁度和整体切割速度具有重大影响。
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