He saw a prototype for a computer that featured the "mouse" controller that is now commonly used.

他看见了一台以鼠标控制器为特色的电脑样品，鼠标控制器现在已很常用。

youdao

He saw a prototype for a computer that featured the "mouse" controller that is now commonly used.

他看见了一台以鼠标控制器为特色的电脑样品，鼠标控制器现在已很常用。

youdao