This is the top view of an oxygen-silicon tetrahedron. The four large spheres represent oxygen atoms, and the dark one represents a silicon atom.是什么意思_This is the top view of an oxygen-silicon tetrahedron. The four large spheres represent oxygen atoms, and the dark one represents a silicon atom.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句