1 N-COUNT [usually singular] 枯燥(或繁重)的工作 You can refer to a task or a job as a treadmill when you have to keep doing it although it is unpleasant and exhausting. 枯燥(或繁重)的工作
2 N-COUNT 踏车;跑步机 A treadmill is a piece of equipment, for example an exercise machine, consisting of a wheel with steps around its edge or a continuous moving belt. The weight of a person or animal walking on it causes the wheel or belt to turn. 踏车;跑步机
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