... lens cell ==> 镜框,镜框,透镜状细胞 lens centre ==> 透镜中心 lens changing ==> 镜头更换,镜头更换 ...
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凸透镜中心部分比周围要厚，它使光线会聚。
A convex lens is thicker at its center than its periphery. It causes rays to converge.
透镜中心：这指定的是透镜畸变中心，单位为像素。
Lens centre: This specifies the centre of lens distortion, measured in pixels.
该仪器可用于磨边或胶合定中心和检验透镜中心误差。
This instrument can be used for centering during edging and cement, and testing centering error of lenses.
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