2 sentences

1. 这首歌曲的和声非常优美。

   zhè shǒu gē​qǔ de hé​shēng fēi​cháng yōu​měi.

   The vocal harmonies of this song are very beautiful.

   Source: Dong Chinese Dictionary

2. 这位歌手由三位专业和声人员伴唱。

   zhè wèi gē​shǒu yóu sān wèi zhuān​yè hé​shēng rén​yuán bàn​chàng.

   The singer is backed by three professional vocalists.

   Source: Dong Chinese Dictionary