Tucked away in the corner of an optics catalog, Fergus found a special filter that blocks visible light, but not IR or UV.
费格斯在一本塞在某个角落的光学器材目录里发现了一种能阻隔可见光的滤光片。
You can use this filter to make only users with certain properties visible to the system.
您可以使用该筛选器仅使得那些具有某种特性的用户对系统来说是可见的。
When the Collapse button is visible, click anywhere to hide the filter sidebar.
当您看到collapse钮时，点击它以隐藏过滤器工具条。
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