这些客户机内置用户执行文档路由任务的功能，如挂起、恢复和继续动作。
These clients have the built-in capabilities for users to carry out document routing tasks, such as suspend, resume, and continue actions.
这种设计使用户当恢复操作在后台异步执行时能够在 Notes 中继续进行其他工作。
This particular design allows the user to continue his other work in Notes while the restore takes place in the background in an asynchronous mode.
如果恰在执行CAS之前线程失去执行权，那么在线程恢复执行之后，CAS会失败，继续循环，直到有有效的数据可用为止。
If there was thread preemption just before CAS, after resumption of the thread, CAS would fail, and the looping would continue until valid data were available.
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