Historical rates, currency conversion codes e, F, and G are calculated.

计算历史汇率、货币转换码e、f和g。

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Figure 1.2 reports another real more sophisticated example where a network of Guards (g) and Guarded Code (c) is presented beside it's distribution into the real application's memory.

图1.2是另一更复杂的实例，它显示了由防护码(G)和受保护代码(C)组成的网络，也包括它们在真实程序内存中的分配方式。

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A personal identification number which provides access to protected areas of the SIM e. g. barred phone books.

个人识别码，用来保护SIM卡中受保护的数据区，例如：限制访问的电话簿。

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