retroactive
adj. 追溯的;有追溯效力的;反动的
例句
They discussed forgetting in short-term memory and retroactive inhibition.
他们探讨了短时记忆的遗忘和倒摄抑制。
This law is not retroactive.
此法不溯及既往。
This is not retroactive.
但是这项法规并无追溯效力。