短語詞組短語bound technique rate substituting 邊際技術(shù)替代率Bound MFN Rate 約束最惠國(guó)關(guān)稅率bound rate of duty [稅收]約束稅率upper bound of compression rate 壓縮上限rate distortion bound 失真界限error rate upper bound 誤碼上限 返回 bound rate