短語詞組短語zero pattern curve 零格曲線zero difference curve 無差異曲線zero velocity curve 零速度線zero yield curve 曲線;零收益曲線zero inflow curve 零值入流基線audiometric zero curve 測聽零級曲線zero -yield curve 零息收益曲線Zero air void curve 零氣隙曲線;空氣孔隙曲線;飽和曲線zero dimensional performance curve [數(shù)]無因次性能曲線 返回 zero curve