Generally speaking, developing an expert system is a process of knowledge acquisition.

一般说来，专家系统的开发是一个知识获取的过程。

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Therefore, lexical phrases play an important role during the process of language acquisition.

因此，在语言习得的过程中词汇短语的学习起到至关中要的作用。

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Therefore, lexical phrases play an important role during the process of language acquisition.

因此，在语言习得的过程中词汇短语的学习起到至关中要的作用。

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