Secondly, this thesis compares the hedging effectiveness of two hedge ratio estimating methods, the Ordinary Least Square (OLS) and Error Correction Model (ECM).是什么意思_Secondly, this thesis compares the hedging effectiveness of two hedge ratio estimating methods, the Ordinary Least Square (OLS) and Error Correction Model (ECM).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句