constant value line

• 等值线

constant value line的用法和样例：

例句

1. The outline is taken as that of the contour line defining its base.
   轮廓由确定它的底部的等值线表示出来。
2. No doubt you are familiar with geographical contour maps, which show lines of constant altitude.
   无疑，你们熟悉地理上的等值线地图，它示出等高线。