Next, to show the individual products of each product category, the user adds the product Name field.

下一步，为了显示每一个产品种类的单个产品，用户就要添加产品名称字段。

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For each product category-a 16-ounce carton of milk, say-well-off households paid an average of 25% more than poor households.

对于每一个商品种类，比如一盒16盎司的牛奶，收入好的家庭要比穷家庭平均多花费25%。

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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.

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。

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Understandably, it would be difficult to create a new category each year yet Apple did update all product lines in 2012.

FORBES: Is Apple Really a "Has Been" Technology Titan?

The various sections that make up the Xbox experience now feature between nine and twelve tiles per category, each serving up a mish-mash of system functions, product advertisements and recommended content.

ENGADGET: Xbox 360 Dashboard update hands-on (fall 2012) Hands-on