由于项目受到资源和时间的约束，该分析常常集中于主要的数据元素和域。

Project constraints in resources and time invariably force a focus down to primary data elements and domains.

youdao

保存在会话中的数据的生命期，最长是从用户访问域的那一刻到用户在预设的一段不活动时间之后超时的那一刻。

The life span of the data saved to a session is, at most, from the moment the user accesses a domain to the moment when a user times out after a preset amount of time of inactivity.

youdao

我们一开始就使用' updated_at '和' created_at '属性域来存放更新数据时的时间戳信息，而不是在收到数据并将其放入数据库的时间。

We started using the 'updated_at' and 'created_at' fields for storing timestamp information about when the data got updated, not when we received it and put it in our database.

youdao