There is a certain relation between safety cost and the main safety indexes.
安全投入与主要安全指标之间存在一定的函数关系。
It refers to a certain mysterious relation - ship of death, witness and survival.
这就是在死亡、见证和幸存之间的某种谜一样的关系。
It refers to a certain mysterious relation - ship of death, witness and survival.
这就是在死亡、见证和幸存之间的某种谜一样的关系。
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