occurrence probability短语¹⁴⁴⁹⁷²⁺² 基本例句 发生概率 Exceptional load cases are those corresponding to events of very low occurrence probability requiring the safe shutdown and inspection of the vessel or plant. 异常负荷案例是相对很少发生的事件，要求安全关停和容器设备的检查。 www.jxcad.com.cn