As it mixes with colder air, there are very violent up currents and down currents and swirling eddies of air, and great clouds foam.

当它与较冷的空气混合时，会有非常猛烈的上升气流和下降气流，空气漩涡和巨大的云层泡沫。

Smooth, deep currents, cascades, falls, and swirling eddies, sing around every tree and leaf, and over all the varied topography of the region with telling changes of form, like mountain rivers conforming to the features of their channels.

流畅、深沉的水流、瀑布、瀑布和旋转的漩涡，在每一棵树和每一片叶子周围歌唱，并在该地区所有不同的地形上歌唱，并以明显的形式变化，就像符合其渠道特征的山区河流。