You look lovely, if I may say so.

我觉得你看上去很可爱。

《牛津词典》

If it is permissible to interpolate a personal humble opinion, I may say that...

若允许陈述一下个人的管见，我则认为…。

《新英汉大辞典》

I may say this: it commenced in a quarrel.

我可以说的是：这是一场争吵引起的。

youdao

The experts at N.I.H.say you may have to repeat this process a few times.

VOA: special.2010.03.31

I would go so far to say that something like a satanic sensibility may be one of our best guides in our reading of Milton.

我大可以这样说，这种撒旦式的艺术感受力,可能是我们阅读弥尔顿时的最好引导之一。

耶鲁公开课 - 弥尔顿课程节选

I'm going to say certain things about it, and you may find yourselves discussing this relationship in section.

今天我就讲一些与此相关的，你们可以在讨论课上讨论之间的关系。

耶鲁公开课 - 文学理论导论课程节选

But if I may say from my experience of government what a war cabinet is like.

BBC: Take your politics too seriously

And I find that, if I may say so, a little bit creepy.

BBC: [an error occurred while processing this directive]

"Your lifestyle, if I may say so, was a lavish one at the expense of your employer, " the judge added.

BBC: Swindling secretary Helen Hart jailed