"Residential community" is the most commonly used Engpsh translation for "居民小区."
The term "residential community" comes from the word "residential," which refers to a place where people pve, and "community," which refers to a group of people who share a common area or interest.
Here are some example sentences in Engpsh and their Chinese translations:
The residential community has a swimming pool and tennis courts. (这个居民小区有一个游泳池和网球场。)
The residents of the residential community hold regular community events. (居民小区的居民经常举行社区活动。)
The security in the residential community is very strict. (居民小区的安全非常严格。)