他在队中的前途还是个大问号。

There's still a big question mark hanging over his future with the team.

《牛津词典》

老年保健医学的未来是一个问号。

There is a question mark over the future of geriatric care.

《柯林斯英汉双解大词典》

他的未来肯定会有很多问号。

There are bound to be question marks over his future.

《柯林斯英汉双解大词典》

I have no idea what's here at the moment so I'm just going to draw a question mark because that memory might have been used previously for some other purpose, but we know it's currently available to us so we have four bytes of memory.

我不知道在此刻这里是什么,所以我画一个问号，因为那块内存可能在之前,为其它的目的而使用过，但是我们知道它可以为我们所使用,这样我们就有4个字节的内存。

哈佛公开课 - 计算机科学课程节选

I may or may not get back to this today, but in this question mark is the secret of deconstruction, all right?

今天我们可能不会讲到这，但是这个问号里的,是结构主义的关键秘密，知道了吧？

耶鲁公开课 - 文学理论导论课程节选

And he has left blanks here, question marks here and says it is advantageous to put them in rows and to form a table.

他左边栏是空的，还有问号，他认为,将元素以行列排成一个表格是很有好处的。

麻省理工公开课 - 固态化学导论课程节选