the nineteen nineties.
the 1990s.
the nineties of the twentieth Century
我复制粘贴的,但这个是对的,很靠谱,感谢 Heart_Calculus
楼主您好:
Nineteen ninties或in the 1990s
祝楼主学习进步
in the 1990s
in the 1990s.
写成1990s。读为nineteen nineties
In the 1990s (例句:In the 1990s the area became a magnet for new investment。这个地区在20世纪90年代成了新的投资热点。)(若再有问题可以私信我)