财务收入的摊销用计息法计算其中收入按整个合同期内净投资的平均回报率计算
The amortization of financial income is calculated using the interest-bearing method, where income is calculated based on the average rate of return on net investment throughout the entire contract period
以上为机器翻译结果，长、整句建议使用 人工翻译 。