She was accosted in the street by a complete stranger.

在街上，一个完全陌生的人贸然走到她跟前搭讪。

《牛津词典》

Telling a complete stranger about your life is difficult.

向一位完全陌生的人讲述自己的生活是困难的。

《柯林斯英汉双解大词典》

He's a complete stranger to me.

他对我完全是个陌生人。

《新英汉大辞典》

"That's not the only thing you've outgrown." Worst of all,to his beloved Fiona, he is a complete stranger.

VOA: standard.2010.05.27

The sense of being welcomed and loved, despite being a complete stranger, was amazing.

BBC: NEWS | South Asia | Embraced by India's hugging saint

Unfortunately, the earl had no grandsons, meaning the fortune would go to a complete stranger.

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They were fans -- two girls from Canada who were given their tickets by a complete stranger.

CNN: All the world came to Michael Jackson memorial