Depending on the temperature and partial pressure, air contains varying amounts of water vapor.

根据对温度和局部压力的空气含有不同数量的水蒸汽。

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Spherical pellet shape also makes a positive contribution during the drying process which functions due to the differential partial pressure of the water vapor between the pellets and the drying gas.

这种球形颗粒形状在加工过程中也起到积极作用，其功能体现水蒸气在球形颗粒和干气之间具有不均匀压力。

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