Definition: the years from 1990-1999 Level: B2
我花了九十年代的大部分时间环游世界。
I spent most of ___the ___nineties travelling around the world.
在九十年代，汽车污染成为一个严重问题。
In ___the ___nineties, pollution from cars became a serious issue.
许多技术进步发生在九十年代。
Many technological advancements occurred in ___the ___nineties.
