open question

matter on which different views are possible; question that is not yet decided or answered 可自由发表意见的问题; 尚未解决的问题: How many people will lose their jobs is an open question. 有多少人将要失业, 这一问题尚无定论.

op, op (also Op), op art, op-ed, opacity, opague, opal, opalescence, opalescent, opaque, opaquely, opaqueness, OPEC, open, open an account, open cheque, open day, open letter, open out, open prison, open sandwich, open to, open up, open verdict, open vowel, open-air, open-and-shut, open-ended, open-eyed, open-handed, open-handedly, open-handedness, open-heart surgery, open-hearted, open-minded, open-mindedness, open-mouthed, open-plan, open-work, opencast,