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建立了邮政系统，虽然只供官方使用。
They had a mail service, although it was for official use only.
youdao
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目前，该公司已对全球诸多官方机构演示了该系统。
The system has been demonstrated to a number of authorities worldwide.
youdao
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目前，该公司已对全球诸多官方机构演示了该系统。
The system has been demonstrated to a number of authorities worldwide.
youdao