equality line

• 等量线

equality line的用法和样例：

例句

1. In the landscape picture, the disappearance of a flux line or other change of topology is a quantum jump over a mountain ridge into a lower valley.
   在地景图像里，一条通量线的消失或其他拓扑的改变，就代表一个翻越山脊进入低谷的量子跃迁。