zài / yǔ / yīn / xué / kè / shàng / lǎo / shī / jiǎng / jiě / le / bù / tóng / yǔ / yán / de / yīn / cháng / chā / yì

在语音学课上，老师讲解了不同语言的音长差异。

In phonetics class, the teacher explained differences in sound duration among languages.