method of isocline

例句：

1. 1. The isocline of the mountain crosses the valley at an angle.
   这座山的等倾线以一定角度穿过山谷。
2. 2. The isocline of the river runs parallel to the coast.
   这条河的等倾线与海岸平行。
3. 3.The isocline of the earth's surface is the point where the vertical and horizontal stresses are equal.
   地球表面等倾线是垂直应力和水平应力相等的地方。