What we cannot speak about we must pass over in silence.

对于不可说的东西我们必须保持沉默。

youdao

We should not pass over this disgraceful affair in silence.

我们不应对这件可耻的事保持缄默。

《新英汉大辞典》

I wonder what made the reviewer pass over this aspect of the book in silence.

我不知道书评作者为什么只字不提该书的这一方面。

youdao

It is hard to say how board members justify the lack of action, but in my own case, if I felt the board was functioning well enough, I would pass over the issue in silence rather than cause unpleasant feelings.

FORBES: Call Me Maybe: Women and Corporate Boards