2 sentences for 彩排 (cǎi​pái)

1. 我们今晚要在舞台上彩排一遍。

   wǒ​men jīn​wǎn yào zài wǔ​tái shàng cǎi​pái yī biàn.

   We're going to have a rehearsal on stage tonight.

   Source: Dong Chinese Dictionary

2. 开幕式的前一天，全体演员参加了最后一次彩排。

   kāi​mù​shì de qián yī tiān, quán​tǐ yǎn​yuán cān​jiā le zuì​hòu yī cì cǎi​pái.

   The day before the opening ceremony, the entire cast participated in the final dress rehearsal.

   Source: Dong Chinese Dictionary