翻译：我考试差3分。

I failed the exam for 3 scores.

With 3 more points, I will pass.
I am noly 3 points away from being passed.
I failed the exam due to shortage of 3 points.
I fell 3 points behind pass.
以上4句都可以表达考试差了3分

I failed the exam for 3 scores less.

差三分用less

With 3 more points, I will pass.
I am noly 3 points away from being passed.
I failed due to shortage of 3 points.
I fell 3 points behind.

I failed the exam for 3 scores.

I failed the exam for 3 scores.

i failed the ecam for 3 scores