同位语和定语从句的问题

来源：百度知道 编辑：UC知道 时间：2024/06/02 08:27:48
Elizabeth blackwell,the first woman medical doctor in the unites stateds,founded the new york infirmary,an institution that has always had a completely female medical staff!中的an institution是不是做infirmary的同位语啊？还是定语？

同位语,因为infirmary is an institution 医院（医务室）是一种机构
后面that has always had a completely female medical staff是定语从句，修饰an institution

an instituiion 后面的整个句子都是在解释 infirmary是什么意思，既不是定语从句也不是同位语从句 这种表达形式在文章里经常使用。