地道的说法是
They are two things!
我在电影里看过的。
两个人争吵时这样说的。
就是说这完全是两码事的意思
这两件事没什么联系!
The connection between the two events is remote.
或
They are irrelevant.
these two things are not related at all.
They are not common.
They are not relevant.
A has nothing to do with B