凸透镜近轴光线中，入射线和与其对应且相平行的出射线构成共轭光线，其入射点跟出射点的连线与主光轴的交点，称为凸透镜的焦点，位于透镜中央的点叫光心。
... optical bench 热电偶 optical centre 光心 optical character reader 光学字母阅读装置 ...
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月光光心慌慌 Halloween ; Hgiveeen ; Halloween III Season of the Witch ; Hoffereen
透镜光心 [光] optical centre of lens
镜片光心 optical center of lens
阳光心态 sunshine mentality ; SUNNY MOOD
月光光心慌慌2 Halloween
激光心肌血运重建术 TMLR ; PTMR ; transluminal myocardial revascularization ; transmyocardial laser revascularization
激光心肌血运重建 TMLR
塑造阳光心态 Shaping Sunny Mood ; good article
如果老师是星光，我就是星光心中的明星。
If the teacher is a star, I am the star light in the heart of the star.
冠心病；外科治疗；激光心肌血运重建术。
Coronary heart disease; Bypass surgery; Transmyocardial laser revascularization.
乐观的秘密并不偶然——高度乐观的人需要努力来维持他们的阳光心态。
The secret to optimism is that it doesn't just happen — highly optimistic people have to work on maintaining their sunny attitudes.
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