Yuè / yīn / cóng / jiào / shì / lǐ / chuán / chū / lái / hái / zi / men / zhèng / zài / liàn / xí / hé / chàng

乐音从教室里传出来，孩子们正在练习合唱。

Musical sounds came from the classroom, where the children were practicing choral singing.