表达者

例句：

1. 1. The engineer was asked toexplain the working principle of the expressor.
   工程师被要求解释表达器的工作原理。
2. 2. Theartist used a brush to express her emotionsthrough the expressor.
   艺术家通过表达器来表达她的情感。
3. 3. The scientist discovered thatthe expressor could be used to transmitsound waves.
   科学家发现表达器可以用来传输声波。