对不同操作系统的使用和需求促使它们引入线程安全性，并阻止对 BIOS 或硬件的直接访问。
With the usage and demand for different operating systems, made them to introduce the thread security and prevented direct access to the BIOS or Hardware.
访客操作系统使用虚拟机监视程序(VMM)提供的API与hypervisor通信，从而直接访问底层硬件上的某些资源。
The guest operating system USES APIs, provided by virtual machine monitor (VMM), to communicate with the hypervisor to directly access certain resources on the underlying hardware.
应用程序已经不可能绕过现代的操作系统直接访问硬件，一种更普遍的说法就是应用程序以用户态(user mode)运行。
An application cannot bypass the OS and access hardware resources directly. It is commonly said that applications run in user mode.
应用推荐