Mine risk factors have been identified, and based on the theory of the accident causing to find the coal mine safety system consists of man, machine, environment, and management.
对煤矿危险与有害因素进行了辨识，由事故致因理论出发找到构成煤矿安全系统的人、机、环境、管理四个要素。
From the point of view of systems engineering, ship is a typical huge and sophisticated man-machine-environment system.
从系统工程的观点看，舰船是一个典型的、庞大的、复杂的人—机—环境系统。
Geographical Information System (GIS) has the advantage of convenient and powerful data management capabilities and friendly man-machine interaction environment.
地理信息系统(GIS)具有便捷、强大的数据管理功能和友好的人机交互环境等优点。
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