rarefaction
rarefaction 英 [ˌreərɪ'fækʃn] 美 [ˌrɛrəˈfækʃən]
n. [声] 稀疏；（气体）稀薄
名词复数:rarefactions
- A decrease in the density of something is rarefaction. As you climb a mountain, you experience rarefaction of the air; the air becomes less dense the higher up you go.
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- n. [声] 稀疏；（气体）稀薄
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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。
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2. The rarefaction wave immediately behind shockwave decompressed the shattered rock and threw them along with jet current.
紧接着冲击波后面形成的稀疏波使压碎的岩石减压并随喷射流（气浪）抛出。
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3. The net effect on the pressure distribution is maximum pressure amplitude at points of maximum compression and minimum pressure at points of maximum rarefaction.
气压分布的有效效应是最大气压变化幅度在最大压缩点和最小压力在最大稀薄点。
- 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.
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