Some firms have adopted “differential pricing” schemes that use formulas, based on average income per head, to set lower prices in poor countries.
一些公司已经在采用依据人均收入区别定价的方法向贫穷国家提供价格较低的药品。
What CCK does is to apply sophisticated mathematical formulas to the DSSS codes, permitting the codes to represent a greater volume of information per clock cycle.
CCK所做的工作是把复杂的数学公式应用于DSSS代码，以允许该代码在每个时钟周期表示更多的信息。
The theoretic and experienced calculation formulas for lime activity are deduced and summarized as per lime stone calcination mechanism and by means of resolving chemical equation.
依据石灰石煅烧机理及其分解化学反应式，推导、总结出石灰活性度理论计算公式和经验计算公式。
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