| 释义 |
tread.mill5tred7mIln [C]a wide wheel turned by the weight of people climbing on steps around its edge, used in the past to provide power for machines or, more usually, as a punishment for prisoners（用以惩罚囚犯的）踏车The treadmill was introduced as a punishment in prisons in 1817.1817年监狱里采用踏车来作为一种处罚。A treadmill is also an exercise machine which consists of a moving strip or two step-like parts on which you walk without moving forward.健步车A treadmill is also any type of repeated work which is boring and tiring and seems to have no positive effect and no end.重复的令人厌倦而又繁重的工作There were days when child-rearing seemed like an endless treadmill of feeding, washing and nappy-changing.过去抚养孩子似乎就是没完没了的喂食、洗衣和换尿布，繁重而又单调。
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