meaninglessly

He spent the afternoon staring meaninglessly at the rain hitting the windowpane.

(Chinese) 他整个下午都在毫无意义地盯着雨点拍打窗玻璃。

The computer generated thousands of random characters that were meaninglessly arranged.

(Chinese) 电脑生成了成千上万个随机字符，它们被无意义地排列在一起。