名词
中文翻译：三级部门
同义词：
['multi-level department', 'multi-tier department']
例句：
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1. The company hasa three-level structure for its management.
公司有一个三级管理结构。
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2. This project requires a three-level planning approach.
这个项目需要三级规划方法。
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3. The government has introduced a three-level system to improve public services.
政府已经引入了一个三级系统来改善公共服务。