The operating system restrictions for each platform for a 32bit process are shown in Figure 7.

一个32位进程在每个平台上的操作系统限制如图7所示。

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You can control the maximum size of the cache by using the command line option in Listing 1, but note that this maximum size may be constrained by operating system restrictions on shared memory

可以使用清单 1 中的命令行选项控制缓存的最大大小，但是请注意，这个最大大小可能受到操作系统共享内存限制的约束

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This may be possible for development test and system test environments, but other run time environments have restrictions that make such practices impractical, if not impossible.

对于开发测试和系统测试环境有可能是这样，但是由于其他运行时环境的限制，使得这些操作即使不是不可能的，就是不切实际的。

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When the iPlayer first launched the BBC was criticised for producing versions that only worked with Microsoft's Windows XP and which used Microsoft's digital rights management (DRM) system to enforce viewing restrictions.

BBC: iPlayer now available on Mac

In the federal system, severe restrictions have been imposed on the ancient writ of habeas corpus, a common law doctrine predating the U.S. Constitution by several centuries, which allows the wrongly convicted to attack their trials and verdicts.

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Most people who come to this country work and contribute, but there are restrictions because the system needs to be fair and seen to be fair.

BBC: David Cameron talks tough over European migrants' benefits - BBC News