Let's face it: plane rides are stressful.
让我们面对现实吧：坐飞机让人紧张。
Well, we enter when the ray hits the flat face, when we hit the plane.
当射线击中这个平面，就进入了区域。
Clearly each plane graph has exactly one unbounded face.
显然，每个平面图都有一个无界面。
The design standard of motorway is very high, especially in plane, vertical and transect face.
高速公路平、纵、横设计技术标准相当高，路堑边坡是其最为普遍的内容之一。
The design standard of motorway is very high, especially in plane, vertical and transect face.
高速公路平、纵、横设计技术标准相当高，路堑边坡是其最为普遍的内容之一。
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