Parallel lines are, by definition, lines on the same plane that never join.

按照定义，平行线是在同一平面上永不相交的线。

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Facing the confusion of understanding parallel titles, this article confirmed the definition of parallel titles according to the catalogue rules accepted by home and abroad.

面对当前对并列题名认识上的混乱局面，文章根据国内外公认的编目准则对并列题名的概念进行了重新认定。

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The distributed computer system is derived from the concept of parallel processing in the paper and the definition and the features of the architecture are described.

本文从并行处理的概念引出了分布式计算机系统，对它的定义和系统结构特点给以阐述。

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