talk about in terms of介词连用

I know they are two different countries, I was talking about in terms of interior design.

话题是装修格调，A后半句说他讨论的是英式风格和意大利风格有什么区别，为何这里about和in terms of可以连用？是不是about后少了一个it？

I know they are two different countries, I was talking about in terms of interior design.
此句有两处错误。
about 和 in terms of 内容重复，删掉一个。
第二分句没连词却用了逗号。需要加并列连词 and 或 but。
I know they are two different countries, and（but）I was talking about interior design.
我了解它们是两个不一样的国家，而我刚刚说的是室内设计。