这些变化在英语史上被称为元音大变位，涉及七个长元音，或紧元音。
Known as the Great Vowel Shift in the history of English , these changes involve seven long , or tense , vowels .
英语专业学生英语紧/松元音感知实验研究
An Experimental Study on English Major ′ s Perception of English Tense / Lax Vowels
紧元音紧元音紧元音