You can tell vi to place a bookmark at a point in a file by pressing the m key followed by another alphabetic character that denotes the bookmark reference.
可以让vi在文件中的特定位置放上书签。方法是按escape键，再按m键，然后输入另一个表示书签引用的字母表字符。
Conversely, when the search engine key words to determine the page, the picture instead of ALT-attribute is a trusted reference point.
反过来讲，当搜索引擎要判断网页的关键词时，图片的ALT -代替属性是一个可信任的参考点。
This article lays its key point in analyzing the advantage and defect of blog, providing some reference for education blog s application to teaching.
本文的重点在于分析了教育博客的优势与缺陷，为教育博客应用于教学提供了参考。
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