Risk corresponds to the product of loss event frequency (left) and probable loss magnitude (right).

风险等于造成损害的事件的发生频率（左）和可能的损失幅度（右）的乘积。

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The main methods for calculating designed flood are probable maximum precipitation and hydrologic frequency analysis.

设计洪水计算方法主要是可能最大降雨和水文频率法。

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Probable reasons for frequency differences of different speech acts in commercial advertising slogans are also explored.

因此，与断言言语行为和承诺言语行为相关的商业广告标题语较其他标题语出现的频率更高。

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