直至目前，这以前的方法获得的石墨烯纳米带都是粗糙边缘以至于很难研究。
Until now, previous methods to make graphene nanoribbons always produced rough edges that were difficult to study.
脚指甲-修剪指甲并用锉刀磨平指甲，趾甲的粗糙边缘会卡住你的袜子并让导致黑指甲和脚趾水泡产生，尤其是跑下坡时。
Toenails - Trim your toenails straight across and filethem smooth. Rough edges will catch on your socks and help cause black toenailsand toe blisters, especially on downhills.
这些条带的边缘是粗糙的。
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