1. Each language has a different vowel system. 每种语言都有不同的元音系统。
2. The student was practising making a new vowel sound. 这个学生正在练习发一个新的元音。
3. Almost every language has an O vowel, a K consonant, and an A vowel. 几乎每一种语言都有一个 O 元音、一个 K 辅音和一个 A 元音。
4. The main difference is that Australians are used to speaking a little vaguely, and they emphasize vowel pronunciation. 主要的区别是澳大利亚人习惯说话有点含糊，而且突出元音发音。
5. Spanish Silbo, a whistle language, has only four vowel and four consonant sounds. Audible for miles, it resembles bird calls. 西班牙的席尔波语是一种口哨语言，只有四个元音和四个辅音。几英里外都能听到它的声音，它就像鸟儿的鸣叫。
