Pages that cannot be mapped need to be dealt with using custom 404 error pages which should be user and search engine friendly.

没有映射的网页需要依惯例使用404错误页面处理，404页面应该对用户和搜索引擎友好。

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In the case of an error page, it may be linked to a valid URL in the search engine local repository.

就错误页面来说，在搜索引擎的本地知识库中，它可能被链接到一个有效的URL。

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These UTE error messages are common symptoms of a native out-of-memory condition because the trace engine is enabled and active by default.

这些UTE错误消息是本机内存不足的一般症状，因为跟踪引擎在默认情况是启动且活动的。

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Speaking before the trial started, Google executives said that it was a fundamental error for regulators to treat the engine as a publisher of information, rather than a distributor.

BBC: Google fights Spanish privacy order in court

Even if the engine produced the correct answers, there was still the risk that a transcription or typesetting error would result in the finished mathematical tables being inaccurate.

ECONOMIST: The world��s latest computer