retroaction
/ˌretrəʊ'ækʃən/ /ˌrɛtro'ækʃən/
n. 
动；
；
及既往
动；；及既往动 词: retroact
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相似单词
retriming, retrimming, retro, retro-, retroact, retroaction, retroactive, retroactively, retroactivity, retro-angle,