在试验选择的优惠条件下进行水处理不仅能延长树脂的有效交换周期而且交换后的给水硬度可趋于零。

Under the optimal conditions, the processing of water can not only prolong the efficient exchange period of the resin, but also make the hardness of feeding water almost to zero.

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在出现上下文切换的情况下(如虚拟处理器将其周期交换给另一个虚拟处理器的时候)，必须保存整个程序的可见处理器状态。

When a context switch occurs in cases such as virtual processor conferring its cycles to another virtual processor, it will be required to save the entire program visible processor state.

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按照周期性间隔发送外发的电子邮件，同时复制服务器上的邮件文件来交换两个数据库之间的任何更改。

At a periodic interval, the outgoing email is sent, and the mail file is replicated with the server version to exchange any changes between the two databases.

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