1、The indifference curve may be compared with a contour line on a map.
無差別曲線可以與地圖上的等高線相比擬。

2、The indifference curve had no curvature at all.
無差異曲線根本沒有彎度。

3、An indifference curve is usually assumed to be convex.
無差異曲線通常呈凸形。

indifference curve翻譯