And while some translation systems use crude rules based on the grammar of languages, Google is exploiting its vast database of websites and translated documents to improve the accuracy of its system.

当一些翻译系统还在用那些基于语法的粗放规则时，Google利用它巨大的网页数据库和翻译文件使它的翻译系统的精确度得到改进。

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The process of reviewing all of the materials could take a month or longer because some documents are encrypted and written materials have to be translated from Arabic into English, officials said.

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