在解析过程中，通过回调事件通知客户事件处理程序。
Client event handlers are informed through callbacks about the events during this parsing process.
第三，它能在SLA停用或网络接口发生更改前通知客户。
Third, it can notify the client of SLA downtime or before changes to the network interfaces take place.
然后我通知客户让我知道她觉得这项工程的合理价格。
I then told the client to let me know what she felt was a reasonable fee for the project.
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