While AWS is incredibly reliable, it’s not perfect, which is also why you can download the data from Lifestream Backup.

即使亚马逊网络服务非常可信赖，它仍然不是完美的，这也是为什么你能从Lifestream Backup下载数据。

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This protects from data loss, but it's not always perfect either.

这个选项能够避免数据损失，但它并不总是完美无缺。

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The network call to get the current time is a perfect item to cache because your 10-second constraint means the data will not be changing for, at most, 10 seconds.

获得当前时间的网络调用是高速缓存的一个完美项，因为您的10秒约束意味着数据在至多10秒钟之内不会更改。

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The King's Fund said the Department of Health data was not perfect but warned the variations in spending were too big to be ignored.

BBC: NHS 'spending lottery persists'

Social data is not a perfect measure by any means, but it does do a surprisingly effective job of revealing mass preference.

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It supplies the user interface, but is otherwise stateless, and may not even store any data, perfect for task workers.

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