The students were questioned on the books they had been studying.

学生被问到有关他们所学课本内容的问题。

《牛津词典》

Clara had been studying ASL for the past year to help blind and deaf people and she knew she'd be able to finger spell into the man's palm.

克拉拉在过去的一年里一直在学习美国手语，以帮助盲人和聋人，她知道她可以在这个人的手掌上拼写。

youdao

As I had been studying rare earth for many years, I have a say over this issue.

我从事稀土研究多年，在这个问题上有发言权。

youdao

That year a French biologist who had been studying reefs in the western Atlantic discovered that they are animals.

VOA: special.2010.08.10

For example, let's pretend that you are speaking with a friend who had been studying for a test for some time.

例如，我们假设你跟一位朋友在聊天，他已经为一门考试复习了好一段时间。

I'm sure 课堂 - SpeakingMax英语口语达人

The agency's lawyers had been studying the New York statute, which passed in January.

WSJ: VA says it won't follow New York gun law

She had been studying for business studies and PE A-Levels as well as a BTEC in animal science.

BBC: Showjumper Ella Pallister dies after fall in Dorset

The court heard that Mrs Sharkey's son Thomas, had been studying accountancy at a Georgia university on a golf scholarship.

BBC: Thomas Sharkey Snr, Bridget and Thomas Jnr