一个边防人员抱怨说，几个星期只来了这么一位游客，还就触发了她负责的虚拟警戒线。
A border guard grumbles that the only tourist in weeks has set off her tripwire.
提出一种基于彩色虚拟检测线的交通流信息视频检测方法。
A new method using virtual trap line is proposed for traffic flow detection.
提出一种基于彩色虚拟检测线的交通流信息视频检测方法。
A new method using virtual trap line is proposed for traffic flow detection.
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