miss sullivan had once been blind herself and she was an extremely gifted teacher.

Sullivan小姐曾经失明过/盲目过，然后她是个极其有天赋的老师。
blind可以表示失明，或是盲目的
可根据上下问来判断应该是哪个

萨利文小姐曾经把自己的眼睛蒙住，并且她是个极其有天赋的老师。

只能这么翻译了...这句子怎么联系起来的...