尽管有许多缺点，第一个植入式心律调整器比之过去还是一个很大的进步。

Despite these drawbacks, the first implantable pacemakers were an improvement over what had come before.

youdao

尽管有许多缺点，第一个植入式心律调整器比之过去还是一个很大的进步。

Despite these drawbacks, the first implantable pacemakers were an improvement over what had come before.

youdao