This is the 4812th most frequent Chinese word.
聖地牙哥縣
San Diego County.
The term '聖地牙哥縣' is used as a proper noun referring to the specific administrative region within California.
聖地牙哥縣是加州的一部分。
San Diego County is part of California.
Here, '聖地牙哥縣' is used to describe the destination of the travel, emphasizing the locality as the geographic area.
我计划去聖地牙哥縣旅行。
I plan to travel to San Diego County.
In this sentence, '聖地牙哥縣' denotes the geographical region when discussing its climate characteristics.