请输入您要查询的英文单词：
单词
retroactive
释义
retroactive
ADJ
FORMAL
/ˌretrəʊˈæktɪv/
a retroactive law or decision affects things that have happened since a particular date in the past , before the law was introduced or the decision was made （法律或决定）有追溯效力的
DERIVED WORD
retroactively
adv