Expansion of a divided difference is a very important analytical tool.
差商展开是个非常重要的解析工具。
Due to difference in disinfection, beer can be divided into processed, raw and fresh beer.
啤酒按照杀菌方法的不同，可分为熟啤酒和生啤酒或鲜啤酒。
Each type can be divided into sub-series or son-series with the difference of study level.
每一类型都具有一定的层次，依研究程度的不同可以划分到亚系列和(或)子系列。
Each type can be divided into sub-series or son-series with the difference of study level.
每一类型都具有一定的层次，依研究程度的不同可以划分到亚系列和(或)子系列。
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