principal point的用法和样例：
例句
- The principal points of a thin lens coincide at the center of the lens.
薄透镜的两个主点与透镜中心相重合。
principal point的相关资料：
临近单词
principal boy
principal
principal axis of stress tensor
principal part of consciousness
principal mechanical components
principal axis of strain tensor
principal components estimation
principal orientation direction
principal -agent relationship
principal part of the attribute
principal square root of matrix
Principal Naval Liaison Officer
