ROI
ROI
Return on investment
投资回报
https://en.wikipedia.org/wiki/Return_on_investment
https://www.investopedia.com/articles/basics/10/guide-to-calculating-roi.asp
本文首发于博客园,作者:xgqfrms,原文链接:https://www.cnblogs.com/xgqfrms/p/12595943.html
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