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。
A cold front is the forward edge of a mass of moving cold air.
冷锋是一团移动着的冷气流的前锋面。
The major controlling influence is the inflow of a cold, dry, air mass .
主要支配的影响是干冷气团之流入。
A mass of cold air is moving south.
大团冷空气正在南移。
Because cooler air has a higher density (greater mass per unit volume), cold air intakes generally work by introducing cooler air from outside the hot engine bay.
因为冷气流密度较高(更大的质量单位体积内)，冷空气引入采一般的工作从外面冷空气热引擎湾。
Answer: There is no difference to energy. However, as mass volume air convection reduces body temperature, sweat occurs later, so the duration will be prolonged and you may catch cold.
答：对能量而言并无差别，不过因空气大量对流，带走体温使发汗时间延后，当然使用时间就会延长，较容易着凉。
Answer: There is no difference to energy. However, as mass volume air convection reduces body temperature, sweat occurs later, so the duration will be prolonged and you may catch cold.
答：对能量而言并无差别，不过因空气大量对流，带走体温使发汗时间延后，当然使用时间就会延长，较容易着凉。
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