It's just a little block of memory in RAM, you know, that represents four bytes, 32-bits and the Number Two is currently in it.

它只是一小块内存块，它表示4个字节，32位,那个数字2就存储在里面。

哈佛公开课 - 计算机科学课程节选

Let's just assume that s1 is a pointer and as an arrow suggests it's pointing at this byte here.

我们假设s1是一个指针,就像箭头所表示的，指向这个字节。

哈佛公开课 - 计算机科学课程节选