每个碳原子的价键为四。
这个分子包含四个呈环状排列的碳原子，每两个碳原子之间形成一个三价键。
The molecule contains four carbon atoms arranged in a ring with a triple bond between two of them.
硅原子占据了氧原子之间的空隙并且和四个氧原子共用化合价。
The silicon atom occupies the space opening( interstice)between the oxygen atoms and shares four valence electrons with the four oxygen atoms.
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