treadmill

n. /ˈtredmɪl/ C1

跑步机；单调乏味的工作

An exercise machine with a moving belt for running or walking in place.

仙境例句

In the far future, her sister imagined, people would run on a treadmill and never go anywhere.

姐姐想象着，在遥远的未来，人们会在跑步机上跑啊跑，却哪儿也到不了。