lǎo / shī / zài / kè / táng / shàng / jiè / shào / le / ào / dà / lì / yà / zhōu / de / fàn / wéi / hé / zhǔ / yào / dǎo / yǔ

老师在课堂上介绍了澳大利亚洲的范围和主要岛屿。

The teacher introduced the extent and main islands of Australasia in class.