The Great Vowel Shift refers to a series of systematic sound change in the history of English that involved seven long vowels and consequently led to one of the major discrepancies between English pronunciation and its spelling system.“元音大变换”指的是英语历史中包含七个长元音的一系列系统的声音变化，从而导致英语发音与拼写系统之间的主要差异之一。