扯遠了

go off on a tangent 離題了、扯遠了 

It's has gone too far.

Anyway, .....

I'm getting off the subject.

Seemed/appeared to pull (far) away, ................

It's irrelevant to the subject.

off-topic 離題了

off-topic if it is not within the bounds of the current discussion, and on-topic if it is.

I think we're getting a little off topic, but I am just trying to get the point across.
我想我們有點離題了,不過我只是想要說明我的論點。

You are absolutely beside the point. 不是重點
not important or not related to the subject being discussed.

to digress from the subject
可引用於暫時離開主題，去討論一點別的

to stray from the point
to be far from the subject
to get away from the subject