Another element in the process of ensuring quality is the use of multiple channels. Whittaker exemplifies with Chrome which has had four different channels.
另外一个确保质量的关键元素是使用多重版本。
There are four specialized radio channels, which broadcast different kinds of programmes.
有四种专门广播频道，播放不同类型的节目。
Four channels video inputs and two channels alarm outputs. It is easy to integrate alerts of different kinds of sensors and Sound and Light Alarms.
四路报警输入，两路报警输出，轻松实现各类传感器与声光报警器联动报警。
Four channels video inputs and two channels alarm outputs. It is easy to integrate alerts of different kinds of sensors and Sound and Light Alarms.
四路报警输入，两路报警输出，轻松实现各类传感器与声光报警器联动报警。
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