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Quick answer：The subject refers to an architectural design concept where a courtyard is situated below ground level, with natural light entering through openings. This design is often used to create a serene and light-filled space within a building. The term '采光下沉庭院' combines '采光' meaning natural light, and '下沉庭院' indicating a sunken courtyard. Such designs are popular in modern architecture for their aesthetic and functional benefits.
