The absence of an electron from a silicon atom can be thought of as a hole.
硅原子中缺少一个电子，可以看成是一个空穴。
The four large spheres represent oxygen atoms, and the dark one represents a silicon atom.
图中四个大的圆球代表氧原子，那个暗色的圆球则代表一个硅原子。
The four large spheres represent oxygen atoms, and the dark one represents a silicon atom.
图中四个大的圆球代表氧原子，那个暗色的圆球则代表一个硅原子。
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