2 sentences

1. 全场观众起立合唱国歌。

   quán chǎng guān​zhòng qǐ​lì hé​chàng guó​gē.

   The whole audience stood up to sing the national anthem together.

   Source: Dong Chinese Dictionary

2. 这首歌包含了一段优美的四部合唱。

   zhè shǒu gē bāo​hán le yī duàn yōu​měi de sì bù hé​chàng.

   The song contains a beautiful four-part chorus.

   Source: Dong Chinese Dictionary