比如，一段小程序可以抹去所有的内存；一条简单的指令可以使主机停止运行。

A tiny program can clear all of memory. A single instruction can stop the machine.

youdao

这个程序还允许您为调试目的显示子系统共享内存段。

This program also allows you to display the subsystem Shared memory segment for debugging purposes.

youdao

您可能会忘了跟踪所有指针（指向这些内存位置），并且某些内存段没有释放，还保持分配给该程序。

You might forget to keep track of all the pointers (pointing to these memory locations), and some of the memory segments are not freed and stay allocated to the program.

youdao

All right so it has to live in RAM as opposed to the hard drive because otherwise things would be terribly slow as you know so it's much better if your programs live while they're running in RAM and they end up in what's called the tech segment.

好的，它存在内存中，而不是硬盘中,因为，否则程序会非常的缓慢,程序在内存中运行会好得多,它们在技术段,的地方结束。

哈佛公开课 - 计算机科学课程节选