Our country is in the period of occurrence frequency of public crisis.

我国目前正处在突发公共危机事件的高发时期.

互联网

Not only syntactic position but also occurrence frequency of the other demonstrative pronoun is different.

旁指代词不仅句法位置上存在着差异,在不同的句法位置上出现的频率也不一致.

互联网

Explaining how to use probability, occurrence frequency and expected values in quantifying risk.

解释怎样运用机率理论 、 发生频率及预期数值做风险数量的量度.

互联网