日期:
来源:雅诚德英语网
By useless words and characters I mean common language words such as articles (a, an, the, etc.) and other strings that would be useless for searching (e.g. 's).
至于无用的单词和字符,我指的是普通语言中的词,比如冠词(a,an,the,等)和一些对检索没有用的字符串(比如s)。