他在这些谈判中发挥了主要作用。

He has played a ___predominant role in these talks.

据我所知，离校学生的主要愿望是享受生活。

As far as I know, the ___predominant wish of students leaving school is to enjoy life.

在许多文化中，主要语言通常是大多数人说的那种。

In many cultures, the ___predominant language is often the one spoken by the majority.