The vowel letters 元音字母
How many vowel letters are there in English?
英语里有几个元音字母？
A. Listen once and choose the vowel letters in each groups and write them out.
听录音一遍，找出每一组中的元音字母并将其写出来。
The second, from the point of letter, the meeting between which consonant and vowel letters defined can form a palatalized consonant.
第二，从字母角度，即限定哪些辅音字母和哪些元音字母相遇才能组合成腭化辅音。
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