This is called a rarefaction and is represented by widely spaced dots.
這個區(qū)域稱為稀疏區(qū),并用疏散的小點表示.
辭典例句
The classical elementary waves in Riemann solutions include rarefaction wave, shock wave and contact discontinuity.
黎曼解涉及的經(jīng)典基本波包括疏散波 、 激波和接觸間斷.
互聯(lián)網(wǎng)
"a sound wave causes periodic rarefactions in its medium"
