真有点不好意思，我太幸运了。

I feel almost ashamed that I've been so lucky.

《牛津词典》

不好意思，我的朋友胃疼得厉害。

Excuse me, my friend has a bad stomachache.

youdao

不好意思，我需要你的帮忙。

Excuse me, I think I need your help.

youdao

I'm sorry to cut you out. But do you mind if I ask you one more question? -Absolutely delighted.

不好意思打断您，我可不可以,再问您一个问题？，-当然。

普林斯顿公开课 - 人性课程节选

I'm sorry, I can't pay this.

不好意思，这个我付不起。

I can 课堂 - SpeakingMax英语口语达人

So, as I said, we're finishing up with what we left off with yesterday - or excuse me, on Wednesday.

就像我说过的，我们现在要把昨天,不好意思，是周三没讲完的部分讲完。

麻省理工公开课 - 化学原理课程节选