The talks made progress on peripheral issues, but failed to resolve the main dispute between the two sides. 这些会谈推动了次要问题的进展，却并未能解决双方的主要纷争。

+to We made some discoveries about the immune system that were peripheral to our search for a vaccine. 我们对免疫系统有了一些发现，但这对我们寻找疫苗的研究工作意义不大。