1. A telescope equipped to measure small angular distances between celestial bodies. 
   量日仪一种望远镜，用以测量天体之间微小的角距离
2. a telescope mounted on an east-west axis and used to time the transit of a celestial body across the meridian. 
   装在东西轴上用来安排天体的中天通过子午线的望远镜。
3. used to follow the path of a celestial body and reflect its light into a telescope; has a movable and a fixed mirror. 
   用来跟踪天体的轨迹并把光反射给望远镜；有一个可移动的和一个固定的镜子。
4. ultraviolet radiation; an ultraviolet lamp. 
   紫外线辐射；一盏紫外光灯。
5. Ultraviolet light or the ultraviolet part of the spectrum. 
   紫外光，紫外线的紫外光或光谱的紫外线部分

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