rarefaction

This is called a rarefaction and is represented by widely spaced dots.

这个区域称为稀疏区,并用疏散的小点表示.

辞典例句

The classical elementary waves in Riemann solutions include rarefaction wave, shock wave and contact discontinuity.

黎曼解涉及的经典基本波包括疏散波 、 激波和接触间断.

——期刊摘选