compn.<俚> 免费票v.伴奏abbr.综合中学(=comprehensive)abbr.比赛(=competition)abbr.补偿(=compensation)complanaradj.共面的

1. The simple negative element Barlow increases eyepiece eye-relief.
   简单的消极因素巴卢增加目镜眼救济。
2. Looking through the eyepiece you will see two black circles.
   透过目镜你可以看到两个黑色的圆环。