例句與造句

1. Symmetrical compounds often share the same vertices as other well-known polyhedra and may often also be formed by stellation.
2. The second example of a dioxetane derivative was made shortly after : the symmetrical compound 3, 3, 4, 4-tetramethyl-1, 2-dioxetane, obtained as pale yellow crystals that sublimed even when kept in the refrigerator.
3. It's difficult to find symmetrical compound in a sentence. 用symmetrical compound造句挺難的