在传播中

This paper described the principle of plane ultrasonic spreading abroad in the liquid coming into being ultrasonic grating,educed the density and refractive index changing rule basis continuity equation of not-ideal liquid and Lorentz-Lorenz law,expressing the transformation of the index and refractive index satisfaction similar equation of standing wave,and described the relation curve of the standing wave form at a few special times,liquid density and refractive index periodic variety according to the res...

描述了平面超声波在液体里传播形成超声光栅的原理；根据非理想流体对应的连续性方程和Lorentz-Lorenz定律，推导了液体光栅中液体密度与折射率的周期性变化规律，表明液体密度和折射率变化满足相似的驻波方程；根据推导的结果描绘了几个特殊时刻的驻波波形、液体密度、折射率周期性变化之间的关系曲线；进而由折射率周期性变化规律分析了超声驻波自身像的形成原理，并给出了CGS型超声光栅声速仪利用超声驻波自身像测量声速的方法与实验结果。

In addition to effective contraception, which can be physical separation barrier on the virus, infected users to significantly reduce the risk of diseases being transmitted or - a new condom from more than 10 kinds of natural plant extracts in a useful material, through a special process will be dipping natural latex -Coated membrane in the middle of the formation of three films.

除有效避孕外，它能够从物理隔离上做到阻隔病毒，大大降低了使用者感染或传播疾病的风险——新型安全套从10多种天然植物中萃取出有益物质，通过特殊工艺浸渍将天然乳胶基膜包覆在中间形成三层膜。

One, what is " ground " and " 0 " are applied in electric technology in, when a wiring and earth maintain good contact, electric current can make hemisphere form travel to the earth through ground wire

一、什么是&地&和&零&在电气技术运用中，当一个电器设备和大地保持良好接触时，电流可通过地线向大地作半球形传播

In this paper, the elastic wave propagation in a two-dimensional piezoelectric phononic crystal is studied by considering the mechanic–electric coupling.

本文考虑力电耦合效应，研究了弹性波在二维压电声子晶体中的传播特性。

The whole process includes the analysis, design and implementation of the OOFEM for the acoustic characteristics of underwater anechoic coating.

本文通过对比声波在分层介质材料中传播的吸声系数和透射系数的解析解，验证了自编OOFEM软件的准确性。

In the ω meson propagator there are two k〓k〓 terms, the longitudinal term is unrenormalizable, so it is difficult to take account of it when the baryon current conservation is violated.

矢量介子传播子中含有两个k〓k〓项，其中纵向项是不可重整化的，因此在流守恒被破坏时完全顾及这项的贡献是有困难的。

This suggests that, in evolutionary terms, having antioxidants present in fruit would make a plant more successful at attracting seed dispersers.

这暗示着在长期的进化进程中，含有抗氧化剂的果实能使得植物更成功得吸引鸟类的注意从而传播种子。

Some studies suggested that " diffuse coevolution" between plants and their dispersers might exist, whichmay occur at the level of genus or family.

在种子传播过程中动植物是否存在协同进化关系一直是争论的焦点。

The experimental results have enriched the transmission law of the gas explosion shock wave in complex tunnel, and have positive significance to prevent and control destruction and injury function of the shock wave.

试验结果丰富了瓦斯爆炸冲击波在复杂巷道中的传播规律，对预防和控制冲击波的破坏和伤害作用有积极的意义。

The reason of the transformation is that the evolvement of folktales is dominated by the culture and system of the society.

这一起源于农耕社会的民间故事在从中国传播到日本的过程中，由以兄弟分家为背景引起的两兄弟型故事转变为互为邻居的两个老人之间的故事。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。