随着中古英语的泯灭，发音突然发生了很大的变化，元音的发音变得越来越短。
Towards the end of Middle English, a sudden and distinct change in pronunciation started, with vowels being pronounced shorter and shorter.
这种变化经常是由元音的拉长或省略所致，而其与特定国家的口音极其相似。 虽然病人或许与这种口音有过短暂接触。
The result is often a drawing out or clipping of the vowels that mimic the accent of a particular country, even though the sufferer may have had limited exposure to that accent.
不仅数种元音发生了变化，而且一些语音还从英语的整个发音体系中消失了。
Not only did types of vowel sounds change, but some sounds simply disappeared from the general pronunciation of English.
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