Now I want to free the sky, far away from the bound of the world.

现在我想要自由天空，远离这个被捆绑的世界。

youdao

The sky, the world above, is really bound up with the world below.

高高在上的天空与，下面的世界确实密不可分。

耶鲁公开课 - 1945年后的美国小说课程节选

The next day I follow a US Airways Philly-bound commuter into the sky and get ready for 11 more hours of flying, determined to make North Platte, Nebr.

FORBES: Digital Rules

Other earth-bound food trends and concepts are also finding their way into the sky.

BBC: A possible end to plane food