If the cold air mass is not so strong, its invasion into the center part of a wintertime tropical cyclone strengthens the tropical cyclones.
浅薄冷空气的入侵对热带气旋起加强作用，但强冷空气侵入热带气旋则容易使其减弱消亡。
The structure of cold vortex cloud system is catalogued by two types, the simple vortex structure and the occluded cyclone structure.
冷涡云系的结构可归纳为单纯的冷涡结构和具有锢囚气旋结构两类。
When the rain is caused by cold front, cyclone or typhoon, the rainfall forecast skill is higher than warm front or subtropical high.
冷锋、气旋和台风影响下的降水预报准确率明显高于暖锋和副高影响下的降水。
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