retroactivity

n. 追溯既往 [法] 溯及既往, 追溯效力

词形变化

retroactivities 复数 retroactivities

释义与例句

n.
  1. 1.

    The state or characteristic of being retroactive.

    不可数
  2. 2.

    The application of a law to events that took place before it was made.

    不可数 法律

词源

From retroactive + -ity.

来源：wiktionary