因为它们通常是利用普通硬件来构建的，所以包含的有些硬件不相关却要耗费很多电量和空间。
As they're commonly built from commodity hardware, they include hardware that isn't relevant but consumes power and space.
这是对名称空间的滥用，因为不同类型的卡片明显有一些共同点，而前缀会显示出不同类型的卡片根本不相关。
This is namespace abuse because the different kinds of CARDS apparently have something in common, whereas prefixes should convey that the different kinds of CARDS are totally unrelated.
使用视频分析，由不相关的背景噪音引起的视频记录大大减少，从而减少相同7天周期内所需的磁盘空间。
With video analytics, video recordings caused by irrelevant background noise is greatly reduced, resulting in less disk space required for the same 7-day period.
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