虽然蓝宝石表镜硬度高，理论上只有金刚石才能划伤它，但不代表就万事大吉，还要防止撞击和掉落震碎表镜。

Although high hardness sapphire table mirror, only the diamond can cut it in theory, but does not mean that everything is all right, but also to prevent collision and fall break table mirror.

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针对牙齿美白剂对牙釉质表面结构之影响，以扫描式电子显微镜，结合影像分析进行碎形维度分析，将粗糙度（roughness）量化，再以接触角测试分析牙齿 表面的粗糙程度对于亲水性的影响；

The etched depth profile of enamel surface was tested by SEM and digitized by image analysis to detect the roughness of enamel. And the fractal dimension could quantify the roughness.

youdao

针对牙齿美白剂对牙釉质表面结构之影响，以扫描式电子显微镜，结合影像分析进行碎形维度分析，将粗糙度（roughness）量化，再以接触角测试分析牙齿 表面的粗糙程度对于亲水性的影响；

The etched depth profile of enamel surface was tested by SEM and digitized by image analysis to detect the roughness of enamel. And the fractal dimension could quantify the roughness.

youdao