This chapter is about contrast research of collective bargaining.

本章是对国内外集体谈判的对比研究。

The contrast research between English and Chinese prepositional structures is helpful to reveal the similarities and differences in spatial cognition of the two languages.

对于如何认识空间关系，不同的语言有不同的处理手段。

This paper utilizes the contrast research and the general character research to lay a strong emphasis on discussing these two works backgrounds, writing techniques, and performance keystones.

本文同时运用对比研究和共性研究，重点探讨了这两部作品的有关创作背景资料、具体创作手法与演奏要点这三个方面。