“principal vanishing point”的概念、定义、翻译、参考文献-科学参考

单词	principal vanishing point
释义	principal vanishing point Encyclopedia 工学航摄像片释 principal vanishing point主合点在倾斜像片的主垂面内，过摄影中心作与摄影方向线的平行线，与像片主纵线的交点。
随便看	improper point improper principal ordinal improper prior improper quadric improper quotient object improper rational function improper refinement improper representation improper rotation improper rotation group improper sales behavior improper set improper singularity improper subalgebra improper subclass improper subgraph improper subgroup improper submodule improper subobject improper subset improper subspace improper symbol improper symmetry operation improper transformation impropertransposition

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