For example, instead of having a whole apple, a CRON dieter will just have the apple skin, which contains most of the nutrients.

举个例子，一个克朗饮食法的减会吃下整个苹果，取而代的是，他们会吃下包含了营养的苹果皮。

And then, to keep it updated, using the " updatedb" command that is running through cron, to update this database.

然后，为了保持更新，使用通过 cron 运行的“updatedb”命令来更新此数据库。