And one of the ways you can make a program crash, intentionally or not, is to essentially use up too much memory or call too many functions and what happens is, bam, one hits the other and bad things happen.

其中一个方式能使你的程序崩溃掉，有意或无意的,它本质上使用了太多的内存,或者调用了太多的函数，所发生的，崩掉，一个冲突了另一个，然后发生了坏事情。

哈佛公开课 - 计算机科学课程节选

NULL Maybe it's really close to the number zero to null and, therefore, I'm absolutely going to crash.

可能它很接近数字，因此，程序绝对将崩掉。

哈佛公开课 - 计算机科学课程节选