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.

辞典例句

Structure design, mould design and manufacturing, injection forming and second processing of thin lens are introduced.

介绍薄型透明片的结构设计及模具设计制造 、 注射成型、二次加工.

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