as far back as

• adv. 早在(远在)

as far back as的用法和样例：

例句

用作副词 (adv.)

1. I mailed the letter as early as Friday.
   我早在星期五就把信寄了。
2. She became a film star as early as 1942.
   她早在一九四二年就成了电影名星了。