| 单词 | retroactive |
| 释义 | retroactive UK [ˌret.rəʊ'æk.tɪv] US [-roʊ-] (also retrospective) formal adjective ■If a law or decision, etc. is retroactive, it has effect from a date before it was approved 有追溯效力的；溯及既往的 •the first British law to have retroactive effect第一部有追溯效力的英国法律 |
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