Rarefaction
[,rєәri'fækʃәn]
解釋/意思:
(noun.) a decrease in the density of something; 'a sound wave causes periodic rarefactions in its medium'.
昌西整理--From WordNet
解釋/意思:
(n.) The act or process of rarefying; the state of being rarefied; -- opposed to condensation; as, the rarefaction of air.
艾丽莎手打
例句/造句/用法:
- The pulse of condensation and rarefaction which travels the length of the wire is called a wave, although it bears little or no resemblance to the familiar water wave. 伯莎M.克拉克. 科學通論.
- Sound waves may be said to consist of a series of condensations and rarefactions, and the distance between two consecutive condensations and rarefactions may be defined as the wave length. 伯莎M.克拉克. 科學通論.
校對:拉弗尔斯