First, we need to open the database if it was not previously opened.

第一，如果数据库尚未打开的话，我们需要打开它。

youdao

In our previous site launch, we spent months building a database of products, opened the doors of the site, and it was just too much product, and not enough interaction with our customer base.

在上一次办网站时，我们花了几个月建立产品的数据库，并在网站上公开，但产品数量太多，我们与客户的交流也不够。

youdao

Listing 3 contains this function, which attempts to open the database (if not already opened) and query the database.

清单3包含有这个函数，它尝试打开数据库(如果尚未打开的话)并查询数据库。

youdao