We did a concert that was a small orchestra indoors.

我们在室内举办了一场小型管弦乐队的音乐会。

He said a number of former prisoners could not find a job because of their criminal past. But they could earn some money by playing in small orchestras.

他说，由于过去的犯罪经历，一些出狱的囚犯找不到工作。但是他们可以通过在小型管弦乐队演奏来谋生。