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

Here's where I come back to that example that I already gave you with a question mark next to it when I was talking about Saussure.

我这就要再讲一下我已经讲过的例子,就是我们讲索绪尔时讲到的那个存疑的例子。

耶鲁公开课 - 文学理论导论课程节选

This question mark I mean it's obviously not a question mark.

这一个问号，显然不是一个真正的问号。

哈佛公开课 - 计算机科学课程节选

he says with a question mark.

他打了一个大大的问号

耶鲁公开课 - 美国内战与重建课程节选