And it also has Digital Audio via an optical cable, if you want to use that.
另外，iTV还提供了通过光缆连接的数字音频接口，如果你需要使用到这个的话。
Optical cable
原声例句
历届苹果发布会
VOA 常速 2016年2月合集
A network of synchronized cameras will be connected by high-speed optical cables to memory banks in the Technical Operations Center, where 500 Internet technicians will work in shifts at more than 180 positions.
而一台网络同步的摄像机将通过高速光缆与技术运营中心的存储库相连，那里180多个岗位上的500名网络技术人员会轮流作业。
英语百科
Optical fiber cable
（重定向自Optical cable）
An optical fiber cable is a cable containing one or more optical fibers that are used to carry light. The optical fiber elements are typically individually coated with plastic layers and contained in a protective tube suitable for the environment where the cable will be deployed. Different types of cable are used for different applications, for example long distance telecommunication, or providing a high-speed data connection between different parts of a building.
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