形成，结构formation
双分子羰基形成消除bimolecular elimination with formation of a carbonyl group; 代号Eco2。
背髓网状结构dorsal medullary reticular formation
网状结构reticular formation
群系组formation-group
脊髓reticular formation 网状结构spinal cord
植物群系plant formation
脑干网状结构reticular formation of brain stem