软件一般可分为两类：(1)系统软件；(2)应用软件。
Software can generally be divided into two categories: (1) systems software and (2) applications software.
体育课的密度可分为一般密度和专项密度两类，与之相对应地形成了两类密度的测定方法。
The density of PE can be divided into general density and specialty density, in accordance with it, the two methods of measuring them are formed.
农用塑料薄膜以其生产使用的树脂原料不同一般可分为聚氯乙烯农膜和聚乙烯农膜两类。
The plastic farm film can be classified into PVC farm film and PE farm film depending on resin raw materials used in production.
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