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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。

2·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。

3·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。

4·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。

5·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。

6·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。

7·After gaseous detonation reflects on the right wall, the right-traveling rarefaction waves accelerate the reflected shock.

气相爆轰波在右壁面反射后，右行稀疏波加速反射激波。

8·This paper presents an experimental technique of diaphragm bursting by virtue of the rarefaction wave in double driver shock tube.

本文介绍了在双驱动激波管中运用稀疏波破膜的技术。

9·Rarefaction effect on supersonic flow fields in the transition from near continuum to near free-molecule flow is analyzed numerically.

从近连续流到近自由分子流，计算分析超声速流场的稀薄效应。

10·The result indicated that the retinal pigment epithelium cytoplasmic rarefaction or condensation, rounded abnormalities of basal infoldings were present.

结果表明，视网膜色素上皮有胞浆结构不均，基底膜皱折变圆不规则。

(1)rarefaction wave稀疏波；膨胀波；余波