treadmill

n 1 mill-wheel turned by the weight of people or animals treading on steps round its inside edge (formerly worked by prisoners as a punishment) （人力或畜力的）踏车（旧时用以惩治囚犯）. 2 (fig 比喻) tiring or monotonous routine work; drudgery 累人的或单调的例行工作; 繁重乏味的工作: I can't get off the office treadmill. 我无法摆脱单调的坐班工作.

traveling bag, travelled (US traveled), traveller, traveller (US traveler), travelling, travelling (US traveling), travelogue (US also travelog), traverse, travesty, trawl, trawler, tray, treacherous, treacherously, treacherousness, treachery, treacle, treacly, tread, treadle, treas, treason, treasonable, treasonably, treasure, treasure trove, treasure-house, treasure-hunt, treasurer, treasury, Treasury bill, treat, treat sb. as, treat sb. for, treatable, treatise, treatment, treaty, treble, treble chance,