The outside air was heavy and moist and sultry.

户外的空气阴沉、潮湿而闷热。

《柯林斯英汉双解大词典》

That is what provides the water for Dew Pond, the moist air under the spreading yews and figs below it, and the soil.

这就是露水池的水源头，是下方大片的紫杉和无花果树所需潮湿空气的来源，也是土壤的来源。

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To form a tornado, cold air must sit above warm and moist air, and the wind needs to go in different directions at different heights, creating shear forces.

形成龙卷风，寒冷的空气必须处在暖湿的空气上部，而风应该在不同高度向不同的方向运动，以此创造出剪切力。

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Every year,moist air masses known as monsoon produce large amounts of rainfall in India,East Asia, northern Australia and East Africa.

VOA: special.2010.05.25

I've flipped thousands of those light-as-air, moist and slightly tart pancakes over the years, and they still have a hold on me.

NPR: Sourdough: More than a Bread

Jia, working with the cinematographer Yu Wiklai, is incapable of an ugly or unresonant image: the air seems moist and palpable, and even the thick, rusted pipes of derelict factories appear to breathe.

NEWYORKER: Still Life

Tornadoes are most likely when exceptionally cold, dry air plunges south to violently clash with warm, moist air originating in the Gulf of Mexico.

FORBES: Alarmists Offer A Perfect Global Warming Challenge