tread mill

柯林斯詞典

1. N-COUNT 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. 單調(diào)的工作
He exhausted himself on an endless treadmill to pay for rent and food. 爲(wèi)了支付房租和食物，他精力全都耗在了一份沒完沒了的單調(diào)工作上。
2. N-COUNT 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. 踏車