作者使用图形辅助来说明和扩展文本中的概念，因为图形是描述关系和阐明联系的另一种方式。
Authors use graphic aids to illustrate and expand on concepts taken up in the text because graphics are yet another way of portraying relationships and clarifying connections.
本节描述一种简单的通过使用索引扩展创建反向文本索引的机制。
This section describes a simple mechanism for creating an inverted text index by using index extensions.
当您完成“用击键力学扩展文本输入选项”中所示的步骤后，请返回到这里继续构建测试程序。
Once you have completed the steps shown in "Expand your text entry options with keystroke dynamics," return here to continue building the test program.
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