Gravity, however, causes density waves to move out through the galaxy which in turn triggers the formation of hot, bright young stars, producing the ring that we see in this picture.
引力会使密度波穿透星系，继而形成炽热、耀眼的年轻恒星，产生我们在图片中看到的光环。
This paper presents an analysis of the characteristics and laws of formation of pressure waves in guns, based on the ignition process and propellant bed structure.
本文根据点火过程和药床结构，分析膛内压力波形成的特征及其规律。
Further investigation on the propagation of elastic waves along a fluid-filled borehole in slow formation is studied in the paper.
木文对低速地层裸眼井中弹性波的传播问题作了进一步研究。
We refer the formation of coherent patterns to local frequency shift of chemical waves induced by the inhomogeneity.
我们将有序斑图形成的原因归结为缺陷导致的化学波频率的改变。
Formation: Most hurricanes that eventually make it to the southern United States get their start as tropical waves off the west coast of Africa.
如何形成：对于大部分到达美国南部的飓风都是起源于非洲西海岸的热带海浪。
The formation of sand waves is controlled mainly by underset of tidal current, and also related to tectonic uplift.
沙波形成主要受潮流底流的水动力作用控制，并与构造抬升有关。
The damping mechanisms of viscoelastomeric materials under the vibration waves and the formation mechanisms of the wide range glass transition of micro phase separation IPNs systems are reviewed.
阐述了粘弹性材料在振动波作用下的阻尼机理，指出声波法和模量法的统一性。 综述了互穿聚合物网络技术要点，并解释相分离体系宽玻璃化转变区间的形成机理；
Huge waves, the gap in the formation after injection of the bottom.
巨大的浪涛，在形成的落差注入谷底后。
The waves of horizontal and vertical rock formation of floating, as cosco shipyard area before the landscape design of the background form. Course.
海浪形成横向的晃动和竖向的浮动，作为中远造船厂前区景观设计的底纹形式。
The waves of horizontal and vertical rock formation of floating, as cosco shipyard area before the landscape design of the background form. Course.
海浪形成横向的晃动和竖向的浮动，作为中远造船厂前区景观设计的底纹形式。
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