传统起泡排序是一种简单实用的信息处理方法，但它对事先已基本有序的文件进行操作时却不是高效的。

The traditional bubble sort is a simple and applicable information processing method, but is not effective in operating the file, in which some records have been sorted beforehand.

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文章从教学的实际环节出发，介绍采用“下标法”来讲授数列中的起泡法排序的特点及要领。

In this paper, the author presents a new method for teaching Bubbling Ordering-subscript, which is from the teaching experience and for the teaching practice.

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