Stefan was just passing through to visit his uncle.
Stefan经过那去拜访他叔叔。
英语百科
Uncle
Uncle (from Latin:avunculus "little grandfather", the diminutive of avus "grandfather") is a male family relationship or kinship within an extended or immediate family. An uncle is the brother, brother-in-law or half-brother of one's parent. A biological uncle is a second degree male relative and shares 25% genetic overlap.