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.
本文介绍医院内镜中心数字图文网络系统的数据采集及处理过程。
This article introduces the design, implementation and applied extension of the photograph network system in endoscopy center of hospital.
方法整合资源，成立内镜中心；建立医院感染管理组织，成立医院感染管理小组；
METHODS The resources were integrated, and the endoscope center was established, hospital infection management organization and team were established.
回顾分析长海医院消化内镜中心EP治疗AA成功率、并发症发生率、术后残留率及局部复发率等。
The resection rate, complications, local residual rate and local recurrence of EP for AA at endoscopy center of Changhai Hospital were retrospectively reviewed.
一只淡水虾的头和眼，由来自波多黎各大学玛亚圭斯校区生物系显微镜中心的何塞·r·阿尔曼多瓦拍摄。
The head and eye of a freshwater shrimp, observed by Jose R. Almodovar of the Microscopy Center, Biology Department, UPR Mayaguez Campus, in Mayaguez, Puerto Rico.
讨论超高精度要求的球面曲率半径、透镜中心厚度、球面面形与透镜偏心差等各项指标的综合控制技术与检测方法。
The overall control and test technology for spherical radius of curvature, central thickness, surface accuracy anddecentring error of lenses have been discussed.
提出了次镜支撑的偏置十字型中心结构，该结构具有较高的谐振频率，因此可以用于大口径望远镜中。
An offset cross structure for supporting secondary mirror is proposed. The structure has a higher resonance frequency so it can be applied to large-aperture telescope.
提出了次镜支撑的偏置十字型中心结构，该结构具有较高的谐振频率，因此可以用于大口径望远镜中。
An offset cross structure for supporting secondary mirror is proposed. The structure has a higher resonance frequency so it can be applied to large-aperture telescope.
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