英语语法分析

For example, can be butane or isobutane.

例如可以是丁烷或异丁烷。

This paper elucidates the present situation of research and development of solid acid catalysts for the alkylation of isobutane with butene.

综述了异丁烷与丁烯烷基化反应用固体酸催化剂的研究现状及发展趋势。

The product of propane gas chromatography, second is the highest percentage of butane and isobutane is, the content of olefins are relatively low.

气相产物中丙烷的百分含量最高，其次是正丁烷和异丁烷；烯烃的含量均较低。