Exception handling is a programming language construct designed to handle the occurrence of some condition (exception) that changes the normal flow of execution.
异常处理是一种编程语言构造，旨在处理某些更改常规执行流的情况(异常)。
Risk control refers to control the causes, environment and condition of the risk event in order to reduce the losses of the risk or reduce the possibility of the risk occurrence.
风险控制是指控制风险事件发生的动因、环境、条件等，来达到减轻风险事件发生时的损失或降低风险事件发生的概率的目的。
Gas accumulation in a mine roadway is a prerequisite condition for the occurrence of gas accidents.
矿井巷道瓦斯积聚是瓦斯灾害事故发生的前提条件。
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