retroactively

副词 adv.
中文释义
美 /ˌɹɛtɹoʊˈæktɪvli/

英文释义

副词 adv.
  1. Done after the fact; applying to events that have previously transpired. not-comparable
    — The new legislature passed a resolution retroactively legalizing the actions of the revolutionaries that brought them to power.

词源

Etymology tree
English retroactive
Middle English -ly
English -ly
English retroactively
From retroactive + -ly.
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