Validation of the fields in the product catalog (positive price, non-blank title and description).

确认产品目录中的字段(正数价格，非空的标题和描述)。

youdao

After you gather a list of citations from a periodical index, check to see if your library owns that magazine or journal by searching for the title of the periodical in the library catalog.

当你从期刊索引上收集了一系列的引用时，从图书馆目录上通过搜索期刊刊名检查你的图书馆是否拥有该杂志或期刊。

youdao

From the catalog, we see that is has a title of Project Areas, which can be used as a label for a selection list.

从目录中，我们看到了它有一点的Project Areas，可以用作选择列表的标签。

youdao

Amazon continued to expand its catalog of title offerings for Prime Instant Video, announcing licensing agreements with Discovery Communications and Viacom.

ENGADGET: Amazon's Q1 2012 earnings: net income down 35 percent to $130 million, net sales at $13.18 billion

Amazon.com announced a new licensing agreement with EPIX for movies including The Avengers, Iron Man 2, The Hunger Games, Super 8, Thor, and more, expanding its catalog of title offerings for Prime Instant Video to more than 30, 000 movies and TV episodes.

ENGADGET: Amazon Q3 2012 earnings: $13.18 billion revenue, net loss of $274 million

When you pop in a title the machine scans it for information and creates an on-screen catalog, searchable by the artist, title and type of disc.

CNN: Hold 'Em, Fold 'Em