Clouds return radiant energy to the surface primarily via the atmospheric window. 云主要通过大气窗区向地表辐射能量。
The wind from the small opening on the wall was whirring, while from time to time snowflakes flew in to congeal in pearly drops against the window. 风车哗啦哗啦地响在壁上，通气窗时时有小的雪片飞进来，在窗台上结着些水珠。
