名词
中文翻译：冗余单元
同义词：
['overhead unit', 'overhead storage', 'overhead cost']
例句：
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1. The redundant unit is causing us a lot of trouble.
这个冗余单元给我们带来了很多麻烦。
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2. The overhead unit has been removed from the production line.
从生产线上移除了冗余单元。
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3. The overhead cost is a significant factor in determining the overall profitability of a business.
冗余成本是决定企业整体盈利能力的一个重要因素。