sheep grazing in a field, mindlessly eating what's in front of them在田野上漫不经心地啃食面前牧草的羊群

the long tedium of working mindlessly with his hands机械性手工劳动的漫长乏味

I spent many hours mindlessly banging a tennis ball against the wall.我花了很长时间机械地对着墙打网球。

British troops were pushed mindlessly forward.英军盲目地受命向前推进。