素不相识的英文：
[Literal Meaning]
all long/not/each other/know
to be never acquainted with each other

[解释]
素：平时；识：了解。向来不认识。

[Explanation]
not to know someone at all

[例子]
你我素不相识，让我怎么相信你并把这么一大笔钱给你呢？

[Example]
You and I are strangers to each other. How can you let me trust you and give you such a huge amount of money?

[英文等价词]
not to know someone from Adam
to be strangers to each other
to have never met before

A complete stranger,idiot,nonentity
素不相识的人、十足的白痴、完全的虚构

I met him in town but he didn't even acknowledge me
我在城里见到他，但他却把我当成素不相识的人乙