It was a question that had fascinated him since he was a boy.

这是他自幼就着迷的问题。

《牛津词典》

It seemed hours since Tom had disappeared.

汤姆好像已经走了好几个小时了。

youdao

Then the answer hit me. It had been staring me in the face ever since Lullington.

之后我突然想到了这个答案。自路林顿起这答案就一直明摆在我面前。

《柯林斯英汉双解大词典》

It had been almost ten years since the last major soccer league in the United States had closed down.

VOA: special.2010.06.02

You can see that residential investment, as a fraction of GDP, has been very variable through history of the United States since World War II and that it's had a strong relationship with recessions.

住宅投资要计入,国内生产总值,纵观美国自二战以来,这部分投资,变动很大,而且与衰退存在着密切关联

耶鲁公开课 - 金融市场课程节选

It's been a while since I've been doing that because I haven't had as much free time as I would have liked.

我已经很久没有播报了。因为我最近都没有太多的空余时间。

广播人员怎么样？ - SpeakingMax英语口语达人

Some claimed it contained fossil like features and evidence of ancient microscopic life on the Red Planet, others dismissed the claims, saying it had been contaminated since it had been on earth.

CNN: Life on Mars?

The FSA said it had taken into account the fact that a number of staff involved in the issue had since left the firm and that it had since made significant improvements in "standards of ethics and professionalism".

BBC: UK slaps record fine on Swiss bank

He received the implant in 2007 and has since has had it replaced.

NPR: Trial Under Way In LA Hip Joint Replacement Suit