英语词汇retroactivity怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	retroactivity
释义	ret·ro·ac·tiv·i·ty /ˌretrəʊækˈtɪvətɪ/ n.
随便看	abirritative a bit a bit all right a bit and a sup a bitch in heat a bite at the cherry a bite at the cherry a bite at the cherry (或 apple) a bit much a bit much a-bit-much a bit of a bit of a lad a bit of all right a-bit-of-all-right a bit of fluff a bit of fluff a bit of fluff (或 crumb, crumpet, skirt, stuff, tail) a bit of homework a bit of one's mind a bit of one's mind a bit of right a bit of skirt a bit of spare a bit of stuff

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