The bionic ear has been around for more than 40 years, and many thousands of patients are already wearing them.

仿生耳的出现已有四十多年了，成千上万的患者已经在使用它。

youdao

The bionic ear has been around for more than 40 years, and many thousands of patients are already wearing them.

仿生耳的出现已有四十多年了，成千上万的患者已经在使用它。

youdao