This looks like a series of breaking waves, and it's caused by shearing winds -- the wind above the cloud layer and below the cloud layer differ significantly, and in the middle, in between, you get this undulating of the air, and if the difference in those speeds is just right, the tops of the undulations curl over in these beautiful breaking wave-like vortices.
它就像是一排浪花， 这是由剪断阻隔风力 － 在云层上方和下方的风速 有很大的不同，而在中间层， 就出现了这中波浪起伏的气层， 如果上下的风速正合适的话， 波浪的顶端就会卷曲过来 形成这种美丽的排浪式的漩涡。