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longitudinal plane waves 纵向平面波
If the wavefronts are parallel lines, the waves are called plane waves. 假如波前为一些互相平行的轮廓面，这波就叫平面波。
The definition of sagittal plane is that a longitudinal plane divides the body into right and left sections. 矢状面代表纵向的平面将人体分开左右两部份。
This is equivalent to an angular distribution of constituent plane waves. 这等价于各种成分的平面波的角分布。
Keywords: acoustics, muffler, transfer matrix, plane wave. 关键词：声音、消音器、传输矩阵、平面波。
AnsweThe definition of sagittal plane is that a longitudinal plane divides the body into right and left sections. 矢状面代表纵向的平面将人体分开左右两部份。
If the wavefronts are parellel lines, the waves are called plane waves. 假如波前为一些互相平行的轮廓面,这波就叫平面波。
An eigenstate of momentum, on the other hand, has the form of a plane wave. 在其它方面一个动量特征态具有一平面波形。
The Born approximation assumes that the incident and the outgoing particle can be described by plane waves. 玻恩近似假定入射粒子和发射粒子都可以用平面波来描述。
A special type of unsteady motions which bear a resemblance to plane wave solutions of the linear theory of elasticity can be constructed. 一种特殊类型的、和线性弹性理论中的平面波解有点相象的非稳态运动可以建立起来。
Wang, T. K., 1992. The generalized Goursat-Riemann problem for plane waves in isotropic elastic solids, PH. D. dissertation, University of Illinois at Chicago, USA , 94pp. 王天楷;1988.;弹性半无限空间内倾斜矩形断层之研究;硕士论文;国立台湾大学;117
By using the theory of diffracting integral, the optical field distribution of plane waves passing through an axicon is derived. 利用衍射积分理论，导出平面波通过轴棱锥后的光场分布。
Longitudinal plane of symmetry of vehicle 车辆纵向对称平面
horizontal and longitudinal plane 平纵面设计
When an inhomogeneous plane wave is introduced into a dense dielectric layer, it can bounce between the two boundaries. 把一非均匀平面波引进折射率较高的介质层时，它会在上下界面间来回地“弹”射。
It is important to recall that a sound wave in a nonhomogeneously deformed material cannot be a plane wave. 重要的是要记得，非均匀变形材料中的声波不可能是平面波。
Keep in mind that an idealized monochromatic plane wave must be depicted as an infinite wave train. 要记住，一个理想的单色平面波应当表述为一个无限的波列。
In this paper the positions of images reconstructed by illuminated plane waves of Fraunhofer defocused holographic memory system are theoretically described and discussed. 摘要对用平面波读出夫琅和费离焦全息存储系统再现像的位置进行理论分析与讨论。
The computational results are in accord with the results of plane wave Born Approximation. 计算结果与平面波玻恩近似结果符合得较好
The eigen permeabilities and eigen waves of the basic transmission modes arededuced,which play intrinsical roles in the propagation of plane waves in anunreciprocal medium. 导出了平面波在非互易媒质中传播时，起本质作用的本征导磁率和基本传输模式本征波，本征导磁率对应本征波中的传输常数。