have never met before be strangers to each other a total stranger be a complete stranger to
I have never made his acquaintance.
我与他素昧平生。
—— 给力词典精选When travelling, she preferred anonymous company.
她喜欢同素昧平生的伴侣旅行。
—— 辞典例句My integrity has been called into question by people who have never spoken to me.
我的正直品行竟遭到素昧平生之人的质疑。
—— 《柯林斯英汉双解大词典》I can´t believe you´d tell a total stranger about it!
我不能相信你会把这事告诉一个素昧平生的人!
—— 给力词典精选I have never made his acquaintance.; I don´t know him at all.
我与他素昧平生。
—— 《新英汉大辞典》