category voltage

例句：

1. 1. Different categories of animalshave different characteristics.
   不同类别的动物有不同的特性。
2. 2.The book is divided into several categories foreasy reading.
   这本书被分成几个类别以便阅读。
3. 3. The teacher asked us to categorize the fruits by color.
   老师让我们根据颜色将水果进行分类。