这些新语义对于页面的非视觉用户(包括使用屏幕阅读器这样的辅助技术的用户)和搜索引擎爬虫这样的计算机程序很重要。

These new semantics are important for non-visual users of the page (including anyone using assistive technologies like screen readers) but also for computer programs like search engine crawlers.

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通过由CCD摄像机获得的彩色图像与超声波传感器组获得的距离作为辅助视觉系统实现整个视觉系统功能。

Through image obtained by CCD and distance by the group of ultrasonic sensors as assistant vision system, the whole vision system function is realized.

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