结果表明：“条型”粗糙带可以有效改善流动非对称性、降低当地侧向力；
The results indicate that a "strip" type of grit can reduce the local side force and effectively improve the flow asymmetry;
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.
这些方法得到的石墨烯带都比较宽(超过10nm)，而且边缘粗糙。
Such methods produce ribbons that are relatively wide (more than 10 nm across) with rough edges.
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