treadmill /ˈtrɛdˌmɪl/ noun plural treadmills
plural treadmills
Learner's definition of TREADMILL
1
[count] : an exercise machine which has a large belt that moves around while a person walks or runs on it跑步机;走步机 — see picture at gym 2
[singular] : a boring or tiring activity, job, etc., in which you repeatedly do the same things枯燥重复的工作