名词
中文翻译：邮政局
同义词：
['post office', 'postal department']
例句：
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1. The post office is closed on Sundays.
邮局周日关闭。
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2. The postal department has been working on a new delivery system.
邮政部门一直在努力开发一个新的配送系统。
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3.The postal department is responsible for handling all mail and parcels.
邮政部门负责处理所有邮件和包裹。