[] () the time it will take for the profit from a business project, an asset, etc. to be equal to the amount invested in it投资回收期◆We estimate that the payback period for the new machinery will be two years.我们估计这批新机械的投资回报期为两年。SYNrecovery period the amount of time over which a loan can be paid back贷款偿还期◆The payback period expires on 20 May.贷款偿还期截止到 5 月 20 日。