| 单词 | retroactive |
| 释义 | [/ˏretrəuˈæktɪv; ˏrɛtroˋæktɪv/] adj (fml 文) effective from a past date 溯及既往的 ; 有追溯效力的: The new law was made retroactive to 1 January, ie as if it had come into effect then. 新法令生效日期可追溯到1月1日. |
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