pay·back /ˈpeˌbæk/
投資回收率
payback
n 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; "Vengeance is mine; I will repay, saith the
Lord"--Romans 12:19; "For vengeance I would do nothing.
This nation is too great to look for mere revenge"--James
Garfield; "he swore vengeance on the man who betrayed
him"; "the swiftness of divine retribution" [syn: vengeance,
retribution]