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tread mill的英文翻譯是什麼意思，詞典釋義與在線翻譯：
英英釋義
名詞 treadmill:
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an exercise device consisting of an endless belt on which a person can walk or jog without changing place
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a mill that is powered by men or animals walking on a circular belt or climbing steps
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a job involving drudgery and confinement
