He cannot say, but he knows the protagonists, and will try.

他无法回答，但是他才是主角，所以他会去尝试。

youdao

If I had ever done your father an injury, he might well hate me; but I cannot see why he should despise me and, as you say, hate me without any reason.

如果我曾伤害过你的父亲，那么他完全有理由憎恨我；但我始终无法理解他为何如此鄙视我，而且，如你所说，毫无缘由地恨我。

youdao

I cannot really say more than that, "he said."

我实在无法再说什么了。

youdao

One thing you cannot say about him is that he's culturally insensitive, arguably one of the most sensitive people alive.

但你不能说他在文化方面不敏感，他可以说是还在世的最敏感的人之一。

哈佛公开课 - 幸福课课程节选

He says--and here's that Yeatsian word "all" again--he says: When I try to put all into a phrase I say, "Man can embody truth but he cannot know it."

他说，又是他涵盖一切的词：,当我想用一句话概括时，我说，人可以表现他不理解的真理“

耶鲁公开课 - 现代诗歌课程节选

Keenan has told reporters he knows what he cannot say to his country's guests.

BBC: Canada royal tour: Will history repeat itself?

In the light of the ongoing police investigation, he cannot say any more.

BBC: Metropolitan Police starts computer hacking probe

It is because even if everything is going to plan in the best of all possible military plans, he cannot say much out loud about what the plan is.

ECONOMIST: Bagehot