The indifference curve had no curvature at all.

无差异曲线根本没有弯度。

The indifference curve had no curvature at all.

无 差异 曲线 根本没有弯度。

An indifference curve is usually assumed to be convex.

无差异曲线通常呈凸形。

The indifference curve may be compared with a contour line on a map.

无差别 曲线可以与地图上的等高线相比拟。

Meanwhile the indifference curve also shows that it is not neccessary to change the security combination when such changes in return possess similarity.

然后引入无差异曲线来说明市场中证券期望收益率同方向变化且变化值相差不大时，不必改变证券组合。