回报率的英文：
return rate

参考例句：

Pretax rate of return
税前回报率

These are investments that offer respectable rates of return.
这些都是回报率可观的投资。

return rate of investment for the overpaid part shall be decided separately
对这部分缴费可以另行确定投资回报率

Badly performing loan: Loan with poor prospects for future gains and a low rate of return.
履行不佳的贷款，不良贷款:指一项未来收益前景不好、回报率低的贷款。

return是什么意思：
v. 带回，放回，恢复，回到
n. 回来，归还，回报
adj. （票）双程的，往返的；（旅途）返回的，返程的

The return of a prodigal
回头浪子

Return ReceiptsSettings for requesting or returning receipts
返回收据有关收据的请求或返回有关的设置

To return disappointedly; defeated.
铩羽而归

The groom returned to the carriage.
马夫回到马车那儿。

Blair will return to London tonight.
今晚布莱尔将返回伦敦。

rate是什么意思：
n. 比率，速率；费用
v. 评估；认为；划分等级；值得

cumulative rating
累积收听率

These bonds have an AAA rating.
这些债券的信用度是3A级的。

To rate too low;underestimate.
低估对…估价太低；低估

A Lump Sum Rate of ...
费用合计…

To reduce in rank or rating;demote.
使降级降低级别或降级；使人降级