Extracting nerve cells from the brains of children for a study like this is obviously out of the question.

一般来讲，诸如此类的研究都会提取儿童的脑神经细胞。

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This article is an exploration to biomedical question-answering system. This system is composed of three primary aspects: problem processing, information retrieving and answer extracting.

本文是对生物医学问答系统的一个探索，系统包括三个主要组成部分：问题处理、信息检索和答案抽取。

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Because the system that makes Siri available is so complex and multifaceted, Apple could reasonably justify extracting and using the information contained in just about any question people ask Siri.

FORBES: IBM Banishes Apple's Siri Due To Privacy Concerns