contour of equal loudness

例句：

1. 1. The artist drew a detailed contour of the landscape.
   艺术家画了一幅详细的风景轮廓。
2. 2. The map shows the contours of the mountain range.
   地图显示了山脉的轮廓。
3. 3.The contours of the ocean are constantly changing due to currents.
   海洋的轮廓因洋流而不断变化。