A decade ago most ethylene in North America was made using naphtha, an oil derivative: it is this process that has propylene as its by-product.
十年前，北美的大多数乙烯是石油脑(一种石油衍生物)所制：其生产过程所产生的副产物正是丙烯。
Methods for constructing standard Winner Process can have a very important influence on estimation result of Monte Carlo simulation in the course of pricing financial derivative securities.
在伪蒙特卡罗模拟应用于金融衍生证券定价过程中，标准维纳过程的构造方法对模拟估计的效果具有十分重要的影响。
A new process for preparing the new fungicide - silicon - containing triazole derivative is described.
摘要对一种新型的杀菌剂-含硅的三氮唑衍生物的合成进行了改进，并给出了一条新的合成路线。
A new process for preparing the new fungicide - silicon - containing triazole derivative is described.
摘要对一种新型的杀菌剂-含硅的三氮唑衍生物的合成进行了改进，并给出了一条新的合成路线。
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