Another upside of allocating each program its own memory, is that they're better isolated from one another.

为每个程序分配自己的内存的另一个好处是它们可以更好地相互隔离。

With Virtual Memory, programs can assume their memory always starts at address 0, keeping things simple and consistent.

使用虚拟内存，程序可以假设它们的内存总是从地址 0 开始，从而保持简单和一致。

With the ability to arbitrarily manipulate a program's memory, hackers can bypass things like login prompts, and sometimes even use that program to hijack the whole system.

有了任意修改内存的能力，黑客可以绕过 "登录" 之类的东西，甚至使用那个程序劫持整个系统。