ADJ 不可知的;不可认识的;超越人类理解力（或经验）的 If you describe something as unknowable, you mean that it is impossible for human beings to know anything about it. 不可知的;不可认识的;超越人类理解力（或经验）的 [written]
Any investment in shares is a bet on an unknowable future flow of profits.
任何股票投资都是对不可知的未来利润走向的赌博。
The specific impact of the greenhouse effect is unknowable.