大气环境对电磁波的吸收衰减作用使雷达的作用距离减小，大气异常折射现象使雷达的作用距离增大或减小。
Atmosphere absorbs the electromagnetic wave so that the radar detection distance be reduced, and the atmospheric unusual refraction changes the radar detection distance too.
研究天气雷达测定回波顶高的几种误差表明：大气异常折射会引起回波顶高明显误差。
It has been shown by studying the radar echo top heights that the abnormal refraction of the atmosphere can cause obvious errors in the radar measurements of height.
金刚石异常双折射的不同形式和组合是生长应力和生长期后应力作用的结果。
The different styles and composite of birefringence are caused by growth stress and post growth stress .
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