Question

retroactive adj.有追溯力的；可追溯的 The Latin word retroagere, an ancestor of the adjective retroactive, means "drive or turn back," and goes along with the meaning of the word. Sometimes governments pass rulings that are set as if they were in effect before the ruling was even made, and that means they are retroactive. On the bright side, you might be awarded a salary raise that is retroactive, meaning you'll get paid more for work you did in the past. And, retroactive fads in clothing keep vintage clothing stores in business.

Accepted Answer

英 [ˌretrəʊ'æktɪv] 美 [ˌretroʊ'æktɪv] The adjective retroactive refers to something happening now that affects the past. For example, a retroactive tax is one that is passed at one time, but payable back to a time before the tax was passed. 1[ADJ 形容词]（决定或行为）有追溯效力的 If a decision or action is retroactive, it is intended to take effect from a date in the past.   [FORMAL 正式]There are few precedents for this sort of retroactive legislation.这种有追溯力的法规鲜有先例。retroactivelyIt isn't yet clear whether the new law can actually be applied retroactively.新法令是否具有追溯力还不清楚。

英语单词	retroactive
英美音标	英 [ˌretrəʊ'æktɪv] 美 [ˌretroʊ'æktɪv]
中文释义	adj.有追溯力的；可追溯的
vocabulary简明	The adjective retroactive refers to something happening now that affects the past. For example, a retroactive tax is one that is passed at one time, but payable back to a time before the tax was passed.
vocabulary扩展	The Latin word retroagere, an ancestor of the adjective retroactive, means "drive or turn back," and goes along with the meaning of the word. Sometimes governments pass rulings that are set as if they were in effect before the ruling was even made, and that means they are retroactive. On the bright side, you might be awarded a salary raise that is retroactive, meaning you'll get paid more for work you did in the past. And, retroactive fads in clothing keep vintage clothing stores in business.
柯林斯解释	1 [ADJ 形容词]（决定或行为）有追溯效力的 If a decision or action is retroactive, it is intended to take effect from a date in the past. [FORMAL 正式] There are few precedents for this sort of retroactive legislation. 这种有追溯力的法规鲜有先例。 retroactively It isn't yet clear whether the new law can actually be applied retroactively. 新法令是否具有追溯力还不清楚。

Retroactive Past Adjective Tax Means Meaning Effect Clothing