删除不是空格的非首字母字符（空格将搞乱省略符号，但是它是很好的起点）
Strip out nonalpha characters that are not whitespace (which messes up apostrophes, but it's a good place to start)
省略符号一标记，通常为破折号(—)，指一个单词或字母的省略。
A mark, usually a dash (?), indicating the omission of a word or of a letter or letters.
吉尔先生将他在打字时所付出的努力巧妙地写进了这个没有大写字母和省略号的文本里。
Mr. Gilb's struggles with his own keyboard are deftly woven into the text, which contains no capital letters or apostrophes.
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