求助！The structural differences of the gels were more apparent at the nanoscale, as evidenced by SEM . Long,thin, and highly entangled nanofibers were observed in gels formed by 2 in ethyl acetate and 3 in acetonitrile ; thick, rigid fibers were seen in gel formed by 2 in acetonitrile。希望各位懂凝胶的给翻译一下，主要是在凝胶中会不会形成纤维啊？fiber在这里要翻译成什么意思呢？
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