I knew perfectly well what she meant.

我完全懂她的意思。

《牛津词典》

You know perfectly well what happened.

你完全清楚发生了什么。

《柯林斯英汉双解大词典》

Come, come, Miss Jones, you know perfectly well what I mean.

得啦，得啦，琼斯小姐，你完全知道我的意思。

《牛津词典》

The opposition leader says Saakashvili understands perfectly well that he no longer has full control of the capital,and that the parliament, presidential office, ministries and mayor's office are not working.

VOA: standard.2009.05.05

There is agnosia and agnosia is a disorder which isn't blindness because the person could still see perfectly well.

还有失认症,失认症并非失明,因为患者的视觉没有任何问题

耶鲁公开课 - 心理学导论课程节选

When our political opponent is being ironic about our views we understand the irony perfectly well. We're used to it, we have accommodated ourselves to it, and of course it's the same in reverse.

当政敌讽刺我们的观点,我们能够充分的理解这个讽刺，我们已经习惯这点了,是我们使自己习惯这点的，当然，反之亦然。

耶鲁公开课 - 文学理论导论课程节选

"Leeds knows perfectly well what was being assessed and what decisions were being made, " she said.

BBC: High Court legal bid to save Leeds child heart surgery

"They know perfectly well what happened and so do we, " he said at a hastily called news conference.

NPR: Tensions Up In Venezuela After Polls Close

This is not to say that some of the Democratic complaints may not be perfectly well-founded and justified.

CNN: Borger: Do congressional Dems need intervention?