陌生的英文有strange; unfamiliar; strangeness; inexperienced。

1、这个城市对我来说很陌生。

The city is quite strange to me.

2、对他来说，干农活是一件陌生的事情。

Working in the fields is something completely new for him.

3、我在一个陌生的城市里形单影只。

I was alone in an unfamiliar city.