删除：点击该按钮将删除选定的行从名单上。
Delete: Clicking this button will delete the selected line from the list.
复制：点击该按钮将复制当前选择的跟踪点。
Duplicate: Clicking this button will duplicate the currently selected tracker.
复位：点击该按钮将重置为其默认值摄像机参数。
Reset: Clicking this button will reset the camera parameters to their default values.
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