at a clip

(US informal)at a time; all at once

(美，非正式)每次，一次；同時

I spent several days with him, eight hours at a clip.

我和他共度了幾天，每天八小時在一起。

clip the wings of

trim the feathers of (a bird) so as to disable it from flight

修剪（鳥）的羽毛以防止其飛行