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[光]主镜
1、cosmetic mirror───化妆镜
2、hand mirror───n.手镜
3、mirror───n.镜子；真实的写照；榜样；vt.反射；反映
4、beveled mirror───斜面镜
5、heated mirror───加热式后视镜
6、magic mirror───魔镜；半透玫；幻境；幻镜，哈哈镜，魔镜
7、dream mirror───梦幻镜
8、primary───adj.主要的；初级的；基本的；n.原色；最主要者
9、e mirror───电子镜
1、The clear aperture of a telescope is the diameter of the objective lens or primary mirror specified in either inches or millimeters (mm).───望远镜的孔径显然就是物镜或者主反射镜的直径，一般用英寸或者毫米（mm）来表示。
2、The Hubble's primary mirror, nearly eight feet across.───哈勃望远镜的主镜直径将近8英尺。
3、The primary mirror is 80 cm in diameter, a respectable size even for an observatory on the ground.───主镜的直径为80厘米，这一口径即使在地面天文台也是很可观的。
4、A primary mirror site has good bandwidth, is available 24 hours a day, and has an easy to remember name of the form ftp. . . debian. org.───一个主站有更好的带宽，每天24小时在线，以及更容易记住的名字，如。
5、The brief description is given for the center supports of primary mirror design too.───对主镜中心支承设计进行了简要说明；
6、This is the distance (usually in mm. ) from the lens (or primary mirror) to the point where the telescope is in focus (focal point).───就是从透镜（或者主反射镜）到焦点的距离，通常单位是毫米（mm）。
7、The segmented primary mirror of space-based telescope is controlled by a number of actuators to achieve a required surface shape.───空间望远镜分块式主镜的面形是由其背后布置的若干致动器控制的，是一个复杂的控制XiTong。
8、is the distance (usually in mm.) from the lens (or primary mirror) to the point where the telescope is in focus (focal point).───就是从透镜(或者主反射镜)到焦点的距离，通常单位是毫米(mm)。
9、Card plug green type telescope primary mirror and vice lens can have a variety of different forms, optical properties also different.───卡塞格林式望远镜的主镜和副镜可以有多种不同的形式，光学性能也有所差异。
1、The clear aperture of a telescope is the diameter of the objective lens or primary mirror specified in either inches or millimeters (mm).
2、A primary mirror site has good bandwidth, is available 24 hours a day, and has an easy to remember name of the form ftp...debian. org.
3、Step 2 : Aim the eyepiece at the center of the primary mirror.
4、The primary mirror. This is the paraboloidal mirror at the bottom of the tube.
5、Newtonian and catadioptric telescopes have secondary (or diagonal) mirrors that obstruct a small percentage of light from the primary mirror.
6、The twin giant Keck telescopes are situated at 4, 150 meters atop Mauna Kea, one of the world's best astronomical observing sites, and each has a primary mirror that is 10 meters across.