Even if climbers escape severe mountain illnesses, the air is thin and cold. Breathing is hard.
即使攀登者能幸免于高山疾病的侵害，山上冰冷稀薄的空气也足以让人步履维艰，呼吸困难。
During the severe precipitation, intruding of weak cold air in the mid-and upper-level makes convection strengthened and precipitation reinforced.
强降水期间，中高层弱冷空气侵入使对流加强和降水强度加大。
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