OK, so I fix x equals constant. That means that I slice by a plane that's parallel to the blackboard.

因此我使x等于一个常数，那就是说,用一个平行于黑板的平面来进行切割。

youdao

OK, so I fix x equals constant. That means that I slice by a plane that's parallel to the blackboard.

因此我使x等于一个常数，那就是说,用一个平行于黑板的平面来进行切割。

youdao