an open question

基本解释

It's an open question: is there such a thing as a "cold constitution"?
这是一个尚未解决的问题：有某种像是“感冒体质”这类东西吗？
When or whether the throne will pass to the second generation of Abdul Aziz’s heirs remains an open question.
王位何时，是否会传到阿卜杜勒•阿齐兹的第二代子孙仍然是一个公开的问题。
It remains an open question if peanut butter or products with peanut paste would be likely candidates for the technique.
花生酱或含有花生糊的产品是否可能应用这种技术杀菌，这仍然是一个未解决的问题。

I don't believe that markets are efficient and it doesn't really seem like it should be an open question.
我不相信市场是有效的,而且事实上这似乎,也不应该是一个开放式的问题。
耶鲁公开课 - 金融市场课程节选
So here's my attempt to make the question both a bit more precise, and a question that's an open question.
我正尝试,让这两个问题变得更准确,这是个开放性的问题
耶鲁公开课 - 死亡课程节选
It's an open question whether you'll believe it when this class comes to an end, but I'd be surprised if many of you believe it now.
即使到课程结束时,能否接受这个观点,依然是你们的自由,相反,你们要现在就能接受,倒是会让我感到很奇怪
耶鲁公开课 - 心理学导论课程节选

How big a speed bump that will be for each country is an open question.
FORBES: European Economy