rarefaction是什么意思_rarefaction的用法_词性_词根

双语例句

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。
Objective: For observation and treatment of diabetes followed by rarefaction of bone.

目的：观察和治疗糖尿病伴随骨质疏松。
Objectives: To study the changes in microvascular rarefaction of retinae in hypertensive rats and patients.

目的：了解自发性高血压大鼠和高血压患者视网膜微血管变化。
He believed that the changes things undergo could be explained in terms of rarefaction and condensation of air.

他相信物质的改变可以被解释为一系列的气体的稀释和浓缩。
Rarefaction effect tends to make supersonic flows move smoothly, and to enlarge the influence domain of cylinder.

稀薄效应趋于弱化激波等超声速流动结构，物体影响域增大。

近义词

同根词

词根 rare

释义

diminution in the density of something, especially air or a gas

（尤指空气、气体的）稀薄化，稀薄状态。

Medicine the lessening of density of tissue, especially of nervous tissue or bone

【医】（尤指神经组织、骨质的）稀疏（状态），疏松（状态）。

词源

"early 17th cent.： from medieval Latin rarefactio（n-）, from the verb rarefacere ‘grow thin, become rare’."