The name half-silvered comes from the fact that the reflective molecules coat the glass so sparsely that only about half the molecules needed to make the glass an opaque mirror are applied.
半镀银的名称来自于反射的分子涂层玻璃的事实如此稀少，只有大约一半的分子需要做出一个不透明的镜子用玻璃。
A one-way mirror has a reflective coating applied in a very thin, sparse layer — so thin that it's called a half-silvered surface.
单向认人镜具有反光涂层应用于一个非常薄，稀疏的层——如此之薄这被称为一个半镀银的表面。
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