But in those days I was hesitating to give her the letter.

但是那些日子里，我一直在犹豫给她这封信。

youdao

But in those days, books could only be produced one at a time by hand .

但是在那个时候，依靠手工一次只能制造一本书。

youdao

In fact it was Catherine's idea but in those days women didn't take out patents.

事实上，它是Catherine的创意，只是那时的女人不能办理专利。

youdao

"There were bluefin tuna in the good old days in Brazil but those stocks were fished out and they are gone."

VOA: standard.2010.03.04

There was a lot of physics going on, but we didn't know a whole lot about atomic structure back in those days.

物理学在迅速发展，但在这之前并没有人对,原子结构有很全面的了解。

麻省理工公开课 - 固态化学导论课程节选

But I miss those partying days in Los Angeles, man.

但我时常怀念在洛杉矶参加派对的日子。

旧金山和洛杉矶的差异 - SpeakingMax英语口语达人

But in those days we waited until the next morning to read the printed word.

FORBES: Neil Armstrong Dies; Two Takes On His 'Giant Leap For Mankind'

But in those days, computers were hulking mainframes and there were far fewer of them tethered together.

ECONOMIST: REPORT: COMPUTER NETWORKS

They were refugees, but in those days such a category did not exist.

BBC: Human traffic. Your earlier comments