英语语法分析

The linear relationship between the gas phase standard enthalpies of formation and the substituent constants is discussed.

讨论了气态摩尔标准生成焓与取代基常数间的线性关系。

The substituent effect was discussed.

并对取代基效应作了解释。

The tacticity of polymers is mainly influenced by the polarity of substituent group of vinyl monomer.

作者认为影响聚合物等规度的因素主要是取代基的极性效应。