The tracking of estimate accuracy in terms of actual hours expended not only adds no more information to the team, it also imposes a new form of waste!

通过追踪实际工作小时数来追踪估算准确率，不能为团队提供更多有价值的信息，而且造成了一种新形式的浪费。

youdao

To calculate this kind of estimate accuracy, teams would have to expend effort to capture detailed "actual" hours, a practice not advocated by any Agile approach I've seen.

要计算这样的估算准确率，团队必须要耗费精力获得详细的“实际”工作小时数，我可从没有见过哪个敏捷实践倡议说要这样做。

youdao

After only a couple of hours spent with actual users, the main problems were uncovered.

仅仅经过几小时的真实用户研究，问题的症结就找到了。

youdao

But two batteries failed after fewer than 100, 000 hours of actual flight, one leading to a fire aboard the 787 on the ground in Boston.

CNN: Boeing can conduct Dreamliner test flights

The news comes less than 48 hours after an actual investigation in food safety has impacted Yum!

FORBES: Health Scare At Coca-Cola China; Co Calls It Rumor

In my tests on both machines, the actual installation took about two hours, but a full workday or more was spent tweaking each machine, and getting updates to Windows 8 and its built-in apps.

WSJ: A Review of Windows 8 Upgrade: Not for Old-at-Heart PCs