?公共视频系统
... open systems 开放系统 open video system 公共视频系统 open-circuit voltage (OCV) 开路电压，断路电压 ...
旷场视频追踪系统
The French Open is the only major tournament that doesn't use a video replay system, and Sharapova said that should change.
NPR: Sharapova Reaches 4th Round At French Open
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