关于英语音标的结构优化──英语语音教学漫话之二杨先健（续１－２期）在英语产生的最初，每个字母只有一种读音。但是后来，特别是从中世纪到十九世纪的上半叶，一些英语字母的读音发生了多种变异，并在英语中引入了大量的外来词汇，这与英国多次遭受外族入侵和占领有关... Structural Optimization of English Phonetic Alphabet - The Second Story of English Pronunciation Teaching Yang Xianjian (Continuation 1-2) At the beginning of English production, there was only one pronunciation per letter. But later, especially from the Middle Ages to the first half of the nineteenth century, there were many variations in the pronunciation of some English letters and the introduction of a large number of foreign words in English, which was related to the repeated invasion and occupation of the United Kingdom by the Aliens. ..