Here you should use plural pronoun.

里你应该用复数代词。

The two main principles of the theory adopted in this paper are the Subjacency condition and the ECP, which will help us to know better of the idea we are introducing here.

本文认为汉语中并不存在和一般成语法文献中所论述的接应代词相的现象，进而帮助我们深入认识汉语的某些法性质。