Unless I'm mistaken, she was back at work yesterday.

除非是我记错了，她是昨天回来上班的。

《牛津词典》

All her old bounce was back.

她完全恢复了以往的活力。

《牛津词典》

She was back in a trice.

她一会儿就回来了。

《柯林斯英汉双解大词典》

Mattel agreed to change it. That was back in nineteen ninety-two, the same year as the first Barbie for President doll.

VOA: special.2009.04.06

When I first taught this class that was back in 2002, I taught it at a seminar and had eight students.

我第一次开设这门课程，是在2002年，是以讨论会的形式，只有8名学生。

哈佛公开课 - 幸福课课程节选

Sure, my undergrad life was back in Bombay in India where I studied for the University of Mumbai.

可以，我本科生活是在印度的孟买度过的，我读的是孟买大学。

在学校的经验 - SpeakingMax英语口语达人

People say that the Scillies are like the mainland was back in the 1950s.

BBC: The last piece of England

It was back in 1996 that Berlin held its first Karneval der Kulturen (Carnival of Cultures).

BBC: Berlin��s Carnival of Cultures

This was back when the coolest technology that IBM had was all in the lab.

FORBES: Asiff Hirji's Journey from CIO to President of T.D. Ameritrade - The Beyond CIO Series