试题题干
（）are those which are produced by moving form one vowel position to another and then rapidly and continuously to a third one.
参考答案
正确答案：
试题解析
三合元音是由一个元音位置移动到另一个元音位置，然后快速连续地移动到第三个元音位置而产生的。
（）are those which are produced by moving form one vowel position to another and then rapidly and continuously to a third one.
三合元音是由一个元音位置移动到另一个元音位置，然后快速连续地移动到第三个元音位置而产生的。