n.取代
The substituent effects of ethoxy groupswere studied on the chemical composition and properties of plasma polymers. 研究了乙氧取代基對(duì)聚合物化學(xué)組成和性能的影響。
The fluorescence intensity of porphyrin also relates to the substituent positions on the phenyl groups. 此外，熒光強(qiáng)度還與卟啉的苯環(huán)上取代基的取代位置有關(guān)。
