名词
中文翻译：双层系统
同义词：
['multi-tier system', 'multi-level system']
例句：
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1. The two-tier system is designed to improve efficiency and reduce costs.
这个双层体系旨在提高效率和降低成本。
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2. The company has implemented a two-tier system to streamline its operations.
该公司已经实施了一个双层体系来简化其运营。
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3. The new two-tier system will allow us to better manage our resources.
新的双层体系将使我们能够更好地管理我们的资源。