For instance the Substrate wallpaper I'm using presently will slowly etch a pattern on the home screen over the course of an hour.
例如,我现在使用的壁纸过一个小时会慢慢的在主屏上蚀刻一个图案。
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Researchers at HP Labs recently managed to etch a pattern into a flat piece of silicon so that it could focus light "like a spoon", says Raymond Beausoleil of HP Labs.