决定何时进行迁移时必须考虑的另一个事项是，硬件、操作系统和第三方应用程序的生产更换或转换周期的时间。

Another consideration that must be factored into deciding when to migrate is the timing of production replacement or rollover cycles for hardware, operating system, and third party applications.

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开始对系统进行监视的最佳时间是当您首次将系统应用到生产环境中并且正常运行时，而不是等到用户抱怨系统的性能非常糟糕的时候。

The best time to start monitoring your systems is when you have first put your system in production and it is running well, rather than waiting until your users are screaming about slow performance.

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科尔查瓜山谷的葡萄酒生产商表示，地震损坏了灌溉系统，一些土地在震后长达两周时间内得不到浇灌。

Wine producers in the Colchagua valley say that damage to irrigation systems meant that some fields could not be watered for up to two weeks after the earthquake.

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