Newspapers generally reach an audience only in a limited
问题描述：
Newspapers generally reach an audience only in a limited
area.
这句中为什么 audience之前有an
答
在这个有限区域里唯一的only in a limited area.
audience表示为一个整体,所以用an
His books have a large audience.
他的书有广大的读者.
The audience enjoyed every minute of the performance.
观众自始至终欣赏这次演出.