在32 位机器上页表通常只可以存储在低端内存中。
Page-tables can normally be stored only in low memory on 32-bit machines.
在应用程序使用了大量进程并映射了大量内存的情况下，低端内存可能很快就不够用了。
In a situation where applications use a large number of processes and map a lot of memory, low memory can quickly become scarce.
低端内存只限于物理内存的前896MB，同时还要满足内核其余的大部分要求。
This low memory is limited to the first 896 MB of physical memory and required for use by most of the rest of the kernel as well.
不过，对于那些在大量进程在运行的系统来说，将页表存储到高端内存中可以在低端内存区域挤出更多的内存。
However, for systems in which a large number of processes are running, storing page tables in high memory can be enabled to squeeze more memory out of the low memory area.
从很低端的桌面系统到大型的、企业级的、多处理器的系统，新的内存管理代码已经在它们上面都已经进行了测试和优化。
The new memory management code has been tested and optimized on everything from very low end desktop systems to large, enterprise-class, multi-processor systems.
比起以前的低价机型，许多新推出的低端电脑拥有更大的内存和速度更快的处理器。
Many of these cheaper PCs come with more memory or faster processors than bargain PCs used to have.
许多Beta测试者报告说Windows7比Vista在他们的低端计算机(512MB内存)上运行得更快。
Many beta testers report that Windows 7 runs faster on their low-powered machines (512 MB of RAM) than does Vista.
许多Beta测试者报告说Windows7比Vista在他们的低端计算机(512MB内存)上运行得更快。
Many beta testers report that Windows 7 runs faster on their low-powered machines (512 MB of RAM) than does Vista.
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