如果另一个虚拟处理器需要这个锁，并且拥有多余的周期，那么它通过这个调用将剩余周期交换给第一个处理器。
If another virtual processor needs that lock and has excess cycles, it confers those to the first processor through this call.
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.
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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