The term “vocabulary” is used in different senses.  It can stand for all the words used in a certain( ) period, e.g. Old English vocabulary, Middle English vocabulary and Modern English vocabulary. 
The term “vocabulary” is used in different senses.  It can stand for all the words used in a certain( ) period, e.g. Old English vocabulary, Middle English vocabulary and Modern English vocabulary. 
【正确答案】:HISTORICAL
【题目解析】:词汇”一词用在不同的意义上。它可以代表一定历史时期使用的所有单词,如古英语词汇、中古英语词汇和现代英语词汇。
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