retroactive
🇺🇸
/ˌretrəʊˈæktɪv/
🇬🇧
/ˌretrəʊˈæktɪv/
adjective
R
Affecting something that happened in the past and applying it to the present.
The new law made the tax changes retroactive, so they applied to all past transactions.
新法律使税收变更具有追溯效力，因此它们适用于所有过去的交易。
translation
追溯