Under these systems, air sinks, which keeps clouds from forming.

在这些系统下，空气下沉，使云层无法形成。

Stay cool in a hot climate Well a since cold air sinks and these spots are shaded?

在炎热的气候中保持凉爽 好吧，因为冷空气下沉并且这些斑点是阴影的？

The hot air rises, and the cold air sinks down into the lower part, and away from where you would eat, sleep, and chill.

热空气上升，冷空气下降至低处，远离你吃饭、睡觉以及感到寒冷的地方。

Under these systems, air sinks, which keeps clouds from forming. And if you don't have clouds in the sky-that means the sun can really bake the surface.

在高压系统下，空气下沉，云无法形成。如果空中无云，也就意味着太阳可以真正炙烤地面。

As the patch of air above collects moisture and heat cooler, heavier air sinks around it, pinching it off and pushing it aloft, like an invisible hot-air balloon.

上方的空气有了湿度和热能，较冷、较重的空气会向下包夹它，并把它向上推，如同隐形的热气球。