【译文】Today there are about 25,000Russian-Americans living in and around San Francisco.今天大约有25000美籍俄国人生活在旧金山内或郊区.这是一个There be句型.living in and around San Francisco.现在分词...请问and并列的啥 ？实在不好意思。。in and around, 是两个介词in和around，相当于：in San Francisco（内） and around San Francisco（周围即郊区） 在旧金山内或郊区