那座旧建筑笼罩着一种说不出的悲凉气氛。

The old building had an intangible air of sadness about it.

《牛津词典》

她具备了那种使演员成为明星的说不出的特质。

She has that indefinable something that makes an actress a star.

《牛津词典》

脸上是说不出的悲伤。

The face was unspeakably sad.

youdao

Well, the figure I saw last was a number too small to be mentioned; I mean, to say you just can't really say how much it is, but all right, two percent.

这个数字简直,小的可忽略了,我的意思是说你实在说不出精确地数字,但实际上只有2%左右

耶鲁公开课 - 古希腊历史简介课程节选

Every city has their own unique qualities and things to do, so I cannot really say a specific city.

每一座城市都有自己的特质和可以做的事情，所以我说不出具体哪个城市最好。

我喜爱的城市 - SpeakingMax英语口语达人

And if that's an appealing argument that you have to be in an altered mindset to do something like that, it suggests that people who find that argument convincing do think that they were acting immorally.

而如果只能用这样的辩词,说只有人精神状况不正常，才会干出那种事，这也就意味着，那些觉得该论证有说服力的人们,其实是认为他们行为是不道德的。

耶鲁公开课 - 公正课程节选