I have been doing some historical research.

我一直在进行史学研究。

《牛津词典》

I have been doing community service work in Oakland for the past several years.

过去几年里我一直在奥克兰做社区服务工作。

《柯林斯英汉双解大词典》

I have been doing business in China for 25 years.

我已经在中国做了25的生意。

youdao

And I have not been discouraged from doing so."

VOA: standard.2010.02.14

I was going to say when you first start doing this, even people who have been doing it for a long time still go off on ten-minute daydreams before realizing that their minds were wondering.

我本想说第一次尝试时，但即便是修行多年的人,也会走神十分钟之久,方才意识到自己刚做了白日梦。

普林斯顿公开课 - 人性课程节选

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

Chris and I have been doing them for about three years now on different topics, often in our spare time.

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"Until now I have been doing things the way I saw fit, but I will mend the things that need fixing, " the agency quoted him as saying.

BBC: Japan judo coach 'beat top female athletes'

So we started rolling out new Facebook pages and training managers on their roles in using them, which is what I have been doing over the last several weeks.

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