open question

基本解释

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。
But there is still an open question mentioned in the section "Introduction into the Two-Phase-Commit protocol". What to do, if "Phase 2" failed for a transaction branch?
但是“两阶段提交协议简介”小节中提到仍然存在一个问题，那就是如果第 2 阶段中一个事务分支发生故障，该怎么办呢？
A more open question is whether the investment in IBM sits comfortably with Mr Buffett's philosophy of "value investing", which aims to snap up shares that are being underpriced by "Mr Market".
一个更加开放的问题是，在IBM的投资是否与巴菲特的“价值投资”理念相符合，价值投资的目的是抢先购入被“市场先生”所低估的股票。

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
open your textbook and put a circle around question number one.
打开你的课本，在第一个问题上画一个圈。
Would you please 实战 - SpeakingMax英语口语达人
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

If something is an open question, people have different opinions about it and nobody can say which opinion is correct.