我们现在做的将产生类似于立体声的系统，然后是四声道系统，然后环绕声系统。

What we're doing here will lead to the equivalent of stereo, then quadraphonic, then surround sound.

youdao

我们现在做的将产生类似于立体声的系统，然后是四声道系统，然后环绕声系统。

What we're doing here will lead to the equivalent of stereo, then quadraphonic, then surround sound.

youdao