āo miàn jìng concave mirror 凹面的抛物面镜，平行光照于其上时，通过其反射而聚在镜面前的焦点上，反射面为凹面，焦点在镜前，当光源在焦点上，所发出的光反射后形成平行光束，也叫凹镜，会聚镜。
通讯工程专业英语词汇翻译 ... 镜像 mirror image 凹面镜 mirror， concabe 最小均方法之误调整 misadjustment LMS ...
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凹面镜如果是从圆球上切下来的，圆球的直径会是凹面镜焦距的四倍。
The diameter of a sphere is four times the focal length of a concave mirror cut from it.
藉由改变气球内的气压，就可以调整气球反射给太阳能电池的光线焦距，还有气球内的凹面镜弧度。
The focus of the light on the solar cell can also be fine-tuned by changing the air pressure within the balloon, and thus the curvature of the mirror.
借由改变气球内的气压，就可以调整气球反射给太阳能电池的光线焦距，还有气球内的凹面镜弧度。
The focus of the light on the solar cell can also be fine-tuned by changing the air pressure within the balloon, and thus the curvature of the mirror.
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