long-time
US /ˈlɔŋ.taɪm/
UK /ˈlɔŋ.taɪm/

1.
长期, 老
having existed or continued for a long period of time
:
•
They are long-time friends who have known each other since childhood.
他们是老朋友,从小就认识。
•
She is a long-time resident of this town.
她是这个镇的老居民。