Cloud streets form when low-lying clouds are interrupted by an object such as an island. Similar patterns occur in the wind flow downstream of airplane wings.

当低垂的云层被岛屿一类的物体所阻碍时就会形成云街，飞机在飞行时机翼后方的气流也会形成类似的漩涡。

youdao

Peng's back, I do not know its thousands of miles also, anger and flying, their wings if the cloud days.

鹏之背，不知其几千里也，怒而飞，其翼若垂天之云。

youdao

The roc was very huge, with its back like a big mountain, and its wings like a stretch of cloud which could cover the sky.

鹏长得很大，背脊像一座大山，翅膀像一大片云，能把天空遮住。

youdao

Haze drove on, leaving the man who has helped him: "The blinding white cloud had turned into a bird with long, thin wings and was disappearing in the opposite direction."

海斯继续开车，离开了那位帮助他的男人：,那朵亮白的云转变成了一只有这长而瘦的羽翼的小鸟的形状,消失在另一个方向“

耶鲁公开课 - 1945年后的美国小说课程节选

Ryanair said its 90-minute flight at 41, 000ft showed there was "no visible volcanic ash cloud or evidence of ash on the airframe, wings or engines".

BBC: NI flights cancelled as ash cloud approaches