go back a long way
US /ɡoʊ bæk ə lɔŋ weɪ/
UK /ɡoʊ bæk ə lɔŋ weɪ/

1.
由来已久, 认识很久了
to have known someone or something for a long time
:
•
My best friend and I go back a long way; we've known each other since kindergarten.
我和我最好的朋友认识很久了;我们从幼儿园就认识了。
•
Their business partnership goes back a long way, spanning over two decades.
他们的商业伙伴关系由来已久,已超过二十年。