地震在1986年发生过一次.翻译
问题描述：
地震在1986年发生过一次.翻译
答
The earthquake happened once in 1986.
答
The earthquake occurred once in 1986.
答
The earthquake happened in 1986.
答
The earthquake took place once in 1986
答
There was once an earthquake in 1986
答
(The year of)1986 witnessed an earthquake.