retroactively

• 副词，表示“从过去某一日期起生效”或“适用于先前的时间”，常用于法律、金融和行政语境，描述追溯适用的法律、支付或决定。

An adverb meaning "taking effect from a date in the past" or "applying to a prior time." It is commonly used in legal, financial, and administrative contexts to describe laws, payments, or decisions that are applied retrospectively.

1. After the factC1formal

   Applying to events that have already occurred; effective from a past date.

   追溯地

   • The new law was applied retroactively to cases from last year.
   • The salary increase was granted retroactively to the beginning of the quarter.
   • The contract was amended retroactively to include the missing clause.

   同义词ex post factoretrospectively

   反义词henceforthhereafter