美[?r?r??f?k??n] 1 . This is called a rarefaction and is represented by widely spaced dots.
這個區域稱為稀疏區,并用疏散的小點表示.
來自辭典例句
2 . The classical elementary waves in Riemann solutions include rarefaction wave, shock wave and contact discontinuity.
黎曼解涉及的經典基本波包括疏散波 、 激波和接觸間斷.
來自互聯網
1.稀疏〔狀態〕，疏松〔狀態〕：密度減小，重量減輕，但體積不變的情況
