a speech sound produced by humans when the breath flows out through the mouth without being blocked by the teeth , tongue or lips
发音
例句
1. A long vowel is a long sound as in the word "shoe". 长元音即如“shoe” 一词中的长音。 2. The vowel in words like "my" and "thigh" is not very difficult. 单词my和thigh中的元音并不难发。