QEMU 是一个平台虚拟化应用程序，让您能够仿真完整的计算机（处理器和相关的外部设备），用于在其上虚拟化另一种操作系统。
QEMU is a platform virtualization application that allows you to emulate an entire computer (processors and associated peripherals) for purposes of virtualizing another operating system on it.
目前，64位平台上(处理器和操作系统)支持8gb到1tb的内存，而32位的操作系统，正如下列表所显示，最高仅能支持到4gb。
Currently, the 64-bit platform (processor and operating system) supports 8 GB to 1 TB of RAM, whereas the 32-bit operating system supports only up to 4 GB as indicated in the bullet below.
Linux 是可以使用 64 位处理器的跨平台操作系统之一，现在 64 位的系统在服务器和桌面端都已经非常常见了。
Linux was one of the first cross-platform operating systems to use 64-bit processors, and now 64-bit systems are becoming commonplace in servers and desktops.
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