introduction 介绍, 引见，引论，引言例如：Mary was shy at her introduction to the company.instruction 命令, 指示；讲授, 指导, 教学；使用说明书, 操作指南例如：They had received instructions to watch him.他们收到了监视他的命令      The instructions for assembling the toy are very clear.如何装配玩具的说明非常清楚明了。

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