One concrete use case is the handling of documents in an accounting system.

一个具体的用例就是处理会计系统中的文档。

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The last known case was in Britain in 1978 when a university photographer who worked above a lab handling smallpox died after being accidentally exposed to it from the building's air duct system.

众所周知的世上最后一例天花发生在1978年的英国。 那是一个（无辜的）大学摄影师，当时他正在天花实验室的楼上房间里工作，死于接触到大楼的风道系统偶然带出来的天花病毒。 （译者注：这位摄影师也太冤了。）

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Article 3 the system of department responsibility, graded management, report and case-filing shall be adopted in the handling of radioactive accidents.

第三条对放射事故处理实行部门负责、分级管理和报告、立案制度。

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