以英语为写作语言的书中有约半数的单词没有出现在一般的词典当中，研究者如是说道。
About half of the words used in English-language books don't appear in standard dictionaries, the researchers say.
以英语为写作语言的书中有约半数的单词没有出现在一般的词典当中，研究者如是说道。
About half of the words used in English-language books don't appear in standard dictionaries, the researchers say.
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