通过一系列的观察和分析发现：(1)黑点的强反光性是由树枝状晶体产生。
From a series of observation and analysis it is found that: 1. The high reflection on the surface of the specks is produced by the branch shape crystallite.
其最大优点：装饰性能强，采光性能和通透性都比较好，基本不需要日常维护。弊端：容易破损，有些反光。
Itss biggest advantage: strong decorative performance, lighting performance and permeability is good, basic don't need daily maintenance. Disadvantages: easy to damage, some reflection.
反光效果好，附着力强。
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