cold-air mass的意思|示意

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。

A mass of cold air is moving south.

大团冷空气正在南移。

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。

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。

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。

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。