category and characteristics 种类及特点
Environmentally degradable polymers-Category and characteristics 环境降解高分子分类和特征
Driven by the meta data characteristics of each category, tools will be used to access and prepare the data within each category.
受各个类别元数据特性的驱动，工具将用于访问和准备各个类别中的数据。
Each has its own characteristics, and individual sites within each category have their own too.
每一种都有其各自的特点，并且在这些类型中的各个景点又各有特色。
Custom categories must handle common characteristics of a category, such as managing a list of contained children, label, icon name, and so forth.
自定义类别必须处理一个类别的共有特性，例如管理一组子类、标签、图标名称等。
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