yǎn / chàng / huì / kāi / shǐ / qián / bàn / wǔ / yǎn / yuán / yǐ / jīng / zài / hòu / tái / rèn / zhēn / pái / liàn

演唱会开始前，伴舞演员已经在后台认真排练。

Before the concert began, the backup dancers were already rehearsing seriously backstage.