名词
中文翻译：前后换班
同义词：
['front and back shift', 'front to back shift', 'back to front shift']
例句：
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1. The nurses were on a front-and-back shift.
护士们正在进行前后换班。
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2. They switched from front to back shifts.
他们从前后换班改为了前后换岗。
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3. He had to work the front-and-back shift every day.
他每天必须做前后换班的工作。