be strangers to each other;be a complete stranger to...;didn't know ... before;have never met [seen] each other before ;

Passengers climbed in, sat behind me in total anonymity, and told me about their lives.
乘客们爬进车里, 坐在我后面,素不相识, 然后给我讲述他们的生活.
来源:网络文摘精选People who have never met talk as if they have known each other all their lives.
素不相识的人们互相交谈着,就好像他们彼此早已熟识.
来源:互联网摘选Ask: Which is greatest feature of your face? Pls introduce yourself to us strangers.
问: 你认为自己最有特色的表情是 什么 ?请向素不相识的我们介绍你自己.
来源:互联网摘选
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