Optics system consists of a spherical primary mirror MB at the southern end, a reflecting Schmidt corrector ma at the northern end, with the focal plate in between.

光学系统由在南端的球面主镜MB、在北端的反射施密特改正镜MA构成，焦面在中间。

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System memory should be at least 512 MB of RAM for each version.

用于每一个版本的系统内存至少应该有 512 MB RAM。

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Even on desktop machines, an end-user application that takes more than 90 MB of RAM is looked at with suspicion.

即使在台式机上，一个最终用户应用程序占用超过90 MB的内存就可能有问题了。

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"The US economy just hit a major speed bump, " said Marcus Bullus, trading director at MB Capital in London.

BBC: US economy adds just 88,000 jobs in March

There is no Level 3 cache, RAM maxes out at 640 MB and there is no support for ADC or DVI monitors.

FORBES: Magazine Article

In the spirit of its roots, NetZero even has a free plan that caps bandwidth at 200 MB of data per month.

FORBES: Review: NetZero's Back with More Free Internet