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opticallyexamined是什么意思,求高手解答这是与显微镜有关的,全句Microstructureswereopticallyexaminedbyetchingthemechanicallypolishedsampleswith2%Nital.继续求高手啊!

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optically examined 是什么意思,求高手解答
这是与显微镜有关的,全句 Microstructures were optically examined by etching the mechanically polished samples with 2% Nital. 继续求高手啊!
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答案和解析
把经过机械抛光的样本用2%的硝酸溶液浸蚀,之后就可以用光学方法检查其微观结构.