They had been working for 16 hours straight.

他们已经一连工作了16个小时。

《牛津词典》

The consultants had been working to finish a report this week.

顾问们一直在争取于本周完成一份报告。

《柯林斯英汉双解大词典》

He had been working very hard so he had no qualms about taking a few days off.

他一直辛勤工作，所以休息几天他觉得心安理得。

《牛津词典》

Darwin had been working on his theory for over twenty years when he published " On the Origin of Species."

VOA: special.2009.12.01

I had been working at a public Accounting firm for a couple of years.

我在一家会计事务所已经工作了几年。

为什么是会计学呢？ - SpeakingMax英语口语达人

Amiri had been working for Iran's Atomic Energy Organization, which the U.S.

VOA: standard.2010.07.13

Titov acknowledged that Primakov had been working to resuscitate relationships with Iraq, Syria, Libya and Cuba.

CENTERFORSECURITYPOLICY: Freedom Flame 2013

The boy's father had been working on the pit with a backhoe that afternoon, Carpenter said.

CNN: Searchers find bodies of children buried by wall of dirt

Officials said they had been working with Canadian authorities to try to tackle fraudulent claims.

BBC: Canada toughens its visa demands