英语语法分析

Expansion of enterprise scales to realize polynary management;

规模扩张，实现多元化经营；

Pt and Pt polynary systems, the pyrochlore-type oxide as the catalyst for methanol oxidation was reviewed.

综述了作为甲醇氧化催化剂的铂及铂的多元体系；钙钛矿型氧化物的研究现状。

The paper discusses advantages, disadvantages and applications of sol - gel method in polynary oxide system as well.

评述了溶胶凝胶法制备多组分氧化物的优缺点，介绍了其应用。