rarefaction
[,rɛrə'fækʃən]
- n. [声] 稀疏；（气体）稀薄
英英释义
- 1. a decrease in the density of something;
- "a sound wave causes periodic rarefactions in its medium"
实用场景例句
- 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.
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双语例句
- 1. 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.
来自辞典例句
- 2. The classical elementary waves in Riemann solutions include rarefaction wave, shock wave and contact discontinuity.
- 黎曼解涉及的经典基本波包括疏散波 、 激波和接触间断.
来自互联网
英文词源
- rarefaction (n.)
- c. 1600, from Middle French raréfaction or directly from Medieval Latin rarefactionem (nominative rarefactio), noun of action from past participle stem of Latin rarefacere (see rarefy). Used chiefly in reference to gases.