等体积线

例句：

1. 1. The engineer drew a line on the graph to represent the equal volume of the two liquids.
   工程师在图表上画了一条线，表示两种液体的体积相等。
2. 2. In physics, an isovolume line is a line that divides two volumes in such a way thattheir volumes are equal.
   在物理学中，等体积线是一条线，它将两个体积分割开，使得它们的体积相等。
3. 3. The scientist used an isovolume line to measure the density of a sample.
   科学家使用等体积线来测量样品的密度。