If you want to see how your system compares, you should archive 100 or more mails from the same mailbox and check the CSLD job for the duration field.

如果您想看看在自己的系统中情况如何，那么应该对同一个邮箱中100封以上的邮件进行归档，并检查CSLD任务，查看持续时间字段。

youdao

This limits the power of the electromagnetic field emitted near your ear and the duration of your exposure.

这会减少电磁场在你耳边发出的能量和缩短你被辐射的时间。

youdao

Duration: the duration of the work item, this is shown as "Estimate" in the UI, if the contributor doesn't set value to this data field, we believe its value is 0.

持续时间：工作项的持续期，它会在用户界面中显示为“Estimate”，如果操作者并没有对该数据区域设置值，那么我们相信它的值为0。

youdao

So negotiators on both sides are legitimately competing in an arena quite apart from, and longer in duration than the players on the field or court.

FORBES: Details Of NBA Labor Talks Are More Devilish Than We Can Imagine