hé / chàng / tuán / yòng / lún / chàng / kāi / shǐ / biǎo / yǎn / shēng / yīn / yì / céng / jiē / zhe / yì / céng

合唱团用轮唱开始表演，声音一层接着一层。

The choir began its performance with a round, with one voice following another.