cross section 截面
intersection 交集
geometric figure 几何图形
perpendicular plane 垂直平面
1. The plane section of a cone can be an ellipse.
圆锥体的截面可以是一个椭圆。
2. We need to determine the area of the plane section.
我们需要确定截面的面积。
3. The plane section is a circle when the plane is parallel to the base.
当平面与底面平行时，截面是一个圆。
A: What shape does the plane section form?
A：截面形成了什么形状？
B: In this case, the plane section is a triangle.
B：在这种情况下，截面是一个三角形。
1) 几何学中平面与几何体相交形成的图形
2) 截面
3) 切面
1. 截面；平面切面
e.g.
The plane section is a circle.
该截面是一个圆。
noun phrase
1. The shape or area resulting from the intersection of a plane and a solid.