名词中文翻译1
中文翻译：Unknown
同义词：
['administrative letter', 'official letter']
例句：
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1.The company's letter of administration was sent to the client last week.
公司上周寄出了行政公文给客户。
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2. He received an important letter of administration from his boss.
他收到了老板的重要行政公文。
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3. The letter of administration is required for the registration process.
注册过程需要提交行政公文。