"前年" in Engpsh is referred to as "the year before last."
来源：这是一种通俗的表达方式，用于指代与当前年份相差两年的年份。
Example sentences in Engpsh with Chinese translation:
"I visited my grandparents in the year before last."
(前年我去拜访了我的祖父母。)
"The company's revenue was higher in the year before last."
(公司的收益在前年更高。)
"She graduated from college the year before last."
(她在前年从大学毕业。)