名詞 payback:

1. financial return or reward (especially returns equal to the initial investment)
2. the act of taking revenge (harming someone in retaliation for something harmful that they have done) especially in the next life
   同義詞：vengeance, retribution

1. Expect a payback within six years.
   期望在六年內(nèi)收回一切投入

pay.back

n.（名詞）

The return gained from or paid on an investment:
報(bào)答：對(duì)投入而獲得的或應(yīng)付給的回報(bào)：
例句：
.One problem with space ventures is that the up-front costs are enormous and the paybacks uncertain and far off at best.(Eric Gelman)
.太空事業(yè)的一大問題是，付出巨大的代價(jià)，但是回報(bào)卻是未卜的或遠(yuǎn)不盡人意.(埃里克·蓋爾曼)

The return on an investment equal to the amount invested:
回報(bào)：獲得與投入相等的回報(bào)：
例句：
expect a payback within six years.
期望在六年內(nèi)收回一切投入

A benefit gained as the result of a previous action.
獲到：因以前活動(dòng)所獲得的利益
The act or process of paying back.
償還：回報(bào)的行為或過(guò)程