OST

例句：

1. 1. The OST file contains the music we need for the performance.
   OST文件包含了我们演出所需的音乐。
2. 2. The singer's voice is so clear that you can hear every note on the OST.
   歌手的声音如此清晰，以至于你可以在OST上听到每一个音符。
3. 3. The movie has an OST that plays during the credits.
   这部电影有一个在片尾播放的OST。