“附属设施”常见的英文表达是 ancillary facilities 或 auxiliary facilities。
ancillary facilities： “ancillary”意思是“辅助的、附属的”，强调这些设施是为主设施或主要活动提供支持和辅助作用的，使用较为广泛和专业。例如：The hotel offers a range of ancillary facilities, including a swimming pool, a gym, and a business center.（这家酒店提供一系列附属设施，包括游泳池、健身房和商务中心。）
auxiliary facilities： “auxiliary”同样有“辅助的、附加的”含义， “auxiliary facilities” 也常用来表示附属设施。例如：The factory is equipped with various auxiliary facilities to support its production process.（这家工厂配备了各种附属设施来支持其生产流程。 ）