许多国家没有可靠的检验系统，原因是工作人员短缺、基本实验室服务缺失、检验工具包质量低劣，或者其供应不够稳定。
Many countries do not have reliable testing systems because of staff shortages, lack of basic laboratory services, poor quality test kits or their irregular supply.
邮政包件是邮政行业的传统业务，也是国家要求邮政业必须提供的普遍服务。
Postal parcel business is a traditional business, which is also the general service supported by National Post that was demanded by our country.
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