But if a call comes from a number that has not been approved, the system blocks it.
但是如果信号来自未审核的陌生号码，系统就会对其进行阻拦。
By doing this the write system call returns with the number of bytes it wrote before it got interrupted and the errno set to success.
在这样处理方式下，write系统调用返回被信号中断前已写的字节数，并将errno全局变量设置为成功。
Also note that the result of the write system call is the number of characters written — in this case, 17 plus one carriage return.
还可以注意到，write系统调用的结果是写入字符的个数数目，在这个示例中为17加上一个回车。
Truss returns a list of the system calls, the total time spent executing the call, the number of calls, and any errors found.
truss返回系统调用的列表、执行调用耗费的总时间、调用的次数和任何发现的问题。
Thanks to the new call tracking system the number of false emergency calls significantly decreased.
多亏了有这项新的跟踪系统，突发事件的误报量大为减少。
Errno.h is needed for the declaration of errno, the global system call error number variable (more on that below).
h是声明errno所需要的，errno是全局系统调用错误号变量(下面会有更多介绍)。
The traditional call center consists of a large telephone system and auto - matic call distribution (ACD) system, and includes a certain number of staffs for the services.
传统的呼叫中心，由一个较大的电话系统和自动呼叫分配(ACD)系统组成，并包括一定数量的用于提供服务的座席人员。
Reduce the number of transformers to streamline distribution system for improving Call reliability;
减少变压器数量，简化配电系统，提高供电可靠性；
If this service is used on a PBX system, please call 30667676 as the access number for IDD calls.
若本服务使用于集团电话系统（PBX），拨打长途时请使用30667676作为接入号码，听到欢迎词再输入长途号码。
If this service is used on a PBX system, please call 30667676 as the access number for IDD calls.
若本服务使用于集团电话系统（PBX），拨打长途时请使用30667676作为接入号码，听到欢迎词再输入长途号码。
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