Different Structural Position的用法和样例：
- Substances which have identical molecular formulas but different structural formulas, are known as isomers.
- The use of mechanical stratigraphy to choose between different structural models is discussed.
- This paper has emphatically elaborated fracture structural factors controlling coal &gas ,,outburstmaking otherness of outburst danger on varied structural position.
- Isoenzyme (isozyme) An enzyme that occurs in different structural forms within a single species.