光交换机（Optical switch）是不需要经过电光-光电转换，直接进行光信号交换的数据交换的设备。光交换机大大提高了交换的速率。
该设计将先进的光交换与现有技术相结合，有可能为大容量光交换机的实现提供一条快捷的路径。
This design combines the advanced optical switching with present technologies, it is possible to offer a short-cut to realize tremendous capacity optical switching.
该量子交换机架构主要由两个模块组成，光交叉连接模块以及交换控制模块。
This quantum switch is mainly made up of two modules, optical crossing module and switch controller module.
要在适当的问题米，使用重点测光或浅米，读至m，在曝光的曝光拨号，交换机相机重新构图和拍摄现场。
To meter on the appropriate subject, using spot metering or light meter, read the exposure, switch camera to m, dial in the exposure and recompose the scene and shoot.
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