此循环将创建26个文档，代表字母表的每个小写字母，每个文档包含字符本身及其ASCII字符码。
This loop will create 26 documents, one for each lowercase letter of the alphabet, each document containing the character itself and its ASCII character code.
她还学了一种盲人用的手语字母，即用手指的不同位置代表字母表上不同的字母。
She also learned a kind of alphabet for the blind, in which different finger positions stand for different letters of the alphabet.
她还学了一种盲人用的手语字母，即用手指的不同位置代表字母表上不同的字母。
She also learned a kind of alphabet for the blind, in which different finger positions_______ ________different letters of the alphabet.
她还学了一种盲人用的手语字母，即用手指的不同位置代表字母表上不同的字母。
She also learned a kind of alphabet for the blind, in which different finger positions_______ ________different letters of the alphabet.
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