大气波导是海上经常出现的现象，会导致电波异常传播。
Atmospheric duct is a common phenomenon over the oceans and conditions of anomalous radio propagation.
大气波导传播是一种与特殊的气象条件相关的反常传播现象。
Atmospheric duct propagation is an anomalous propagation phenomena associated with specific weather conditions.
大气波导会使雷达电磁波传播产生异常现象，研究其对雷达探测范围的影响具有重要意义。
Electromagnetic wave of radar propagates abnormally in the duct. It is very important to study the influence of the duct on radar detecting zone.
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