与发生在太阳附近的黄道光的区别就在于对日照的高反射角度。
The gegenschein is distinguished from zodiacal light near the Sun by the high angle of reflection.
远期矩形板既可以平躺或支撑，一个小对象，根据需要适当的反射角度。
The forward rectangular panel can either lie flat or propped up, with a small object, for the proper reflection Angle as required.
使用侧旋可以是出于很多种原因，但是最主要的一点就是改变母球离开目标球之后再吃库时的反射角度。
Side spin is used for a number of reasons, but its main job is to change the Angle the cue-ball bounces off the cushion after hitting the object ball.
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