previously       
adverb uk/ˈpriː.vi.əs.li/ us/ˈpriː.vi.əs.li/
B1 以前地,先前地
before the present time or the time referred to
  She was previously employed as a tour guide. 她以前受聘当导游。 
 I had posted the card two months previously. 我两个月以前就把那张卡片寄了。 
 - More examples
 - This information was previously unavailable to the public.
 - Has anything similar happened previously, or is this the first time he has behaved like this?
 - Factions previously at war with one another are now united against the common enemy.
 - The album includes four previously unreleased tracks.
 - About 23% of men and women aged 25 to 34 told researchers they had previously cohabited with a partner without it leading to marriage.