细菌是单一型的，也就是说，他们只有单一的形式而被我们以单一的种类名称固定下来；

Germs are monomorphic, i.e., they have only one form and can be identified by species

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每个产品文档都有一个惟一产品ID以及浏览目录时常常使用的其他重要信息，包括种类、品牌和名称。

Each product document has a unique product ID, as well as other vital information that is commonly used when browsing the catalog, including category, brand, and name.

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建议更改视图名称和种类，从而以后运行示例时容易找到该视图。

We suggest that you change the view name and category so that the view will be easy to find when you run the sample later.

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