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- The principal direction of small-scale movement is from a shale or clay to a sandstone or other permeable bed. 小范围运动主要从页岩或粘土岩向砂岩或其他渗透性地层中运动。
- The shading indicates the direction of some grain or fibers, i.e. a principal direction of elasticity. 阴影部分表示一些木纹或纤维的方向，即弹性的一个主方向。
- It is concluded that the principal stress state due to the bimodular constitutive model based on principal direction is key. 由于不同模量弹性理论将其本构关系建立在主方向上，因此基于主方向的应力状态分析是研究的关键。
- It is assumed that the trabeculae distribution in the principal direction of the fabric tensor is proportional to the associated eigenvalue of the tensor. 采用均匀化理论，通过有限单元的数值计算建立了松质骨弹性常数与结构张量、固体体积比之间的数值关系，并预测了骨小梁的弹性模量。
- A great quantity of any angle strain rosette readings was gathered in structural test, the principal strain and the principal direction were calculated by computer program written in this paper. 在结构试验中采集得到的成百上千个任意角度应变花的读数,可用本文编写的计算机程序确定其主应变及主方向,从而替代了科研人员大量的手工计算。
- For instance, both vortices, representing the ejection and sweep events respectively, are rotating towards the first principal direction of the strain rate tensor, and strengthened by stretching ete. 例如发现两种渴都向基本流的第一主变形率方向偏转，不断受到拉伸而增强等等。
- The principal directions corresponding to two distinct principal strains are orthogonal. 和两个不同的主胁变相对应的主方向是互相正交的。
- principal direction of curvature 主曲率方向
- The model includes a complete anisotropic permeability tensor.It characterizes the anisotropic permeability distribution with different principal directions in different regions. 模型包含完全各向异性渗透率张量，采用十九点有限差分格式和全隐式迭代方法求解。
- principal direction of oscillation 竹荡方向
- the principal direction of seismic response 地震作用方向
- An expression is derived for the conductance of an electrical contact including the effects of thin films, material properties, principal radii of curvatures and principal directions of axes. 本研究先推导粗糙表面覆盖薄膜之总电导表示式，包含覆盖膜、材料性质、粗糙峰主曲率半径及主轴方向，再应用此式分析粗糙峰金属-膜-金属之接触。
- My wages are the principal source of my income. 薪金是我收入的主要来源。
- The principal shareholder ask for a meeting. 主要股东们要求召开会议。
- The agent spoke on behalf of his principal. 代理人代表他的委托人说话。
- In a little while we lost our sense of direction. 一会儿我们就辨不清方向了。
- Keys are available on application to the principal. 向校长申请就可得到钥匙。
- The signpost points in a westerly direction. 路标指向西。
- She's been downgraded (from principal) to deputy. 她已(从校长)降为副校长。
- Our principal problem is lack of time. 我们的主要问题就是缺少时间。
