两维的

It is hard to draw in two dimensions a picture of a vector function in three-dimensional space.

在两维图上画三维空间的矢函数图形是件难事。

The goal of this thesis is to research on pen-based interaction and 3D interaction Post-WIMP software interface from generic point of view, analyses the common interaction characteristics in Post-WIMP environment, and discuss the corresponding research approaches.

本文的目标在于：以Post-WIMP界面的交互特征研究为基础，分别从笔式交互和三维交互两个方面对Post-WIMP下的软件界面进行研究，提出相应的方法，建立相应的软件平台，并以此来指导基于笔式和三维的Post-WIMP软件的开发。

The wavelet analytic method can find out global and local singularity and singular points of function by local maximum of wavelet transform of Lagrangian function which is made up of two constraint functions without regard for contents of optimization and constraint situation.

不管优化内容及约束情况如何，由对约束函数两两构成的拉格朗日函数的小波变换求局部极大值，将奇异点求解出来。本文对n维空间的小波变换寻优方法给予了理论上的研究与证明，并给出了具体的求解方法。

In a study conducted by Herbert Harari of San Diego State University, and John McDavid of Georgia State University, teachers gave consistently lower grades on essays apparently written by boys named Elmer and Hubert than they awarded to the same papers when the writer's names were given as Michael and David.

在一项由圣迭戈州立大学的赫伯特？哈拉里及乔治亚州立大学的约翰？麦克戴维主持的研究中，与名叫迈克和戴维的作文卷子相比，教师老是给卷上名字为埃尔默和休伯特的男孩写的文章打较低的分数，实际这是同样的两份卷子。

The whole-space response characteristics for three dimensional conductive body located in the floor of the mine drift either in homogeneous medium or in layered medium was simulated, with using Mur absorbing boundary condition and taking a electrical dipole source in homogeneous whole space as a initial source; the diffused regularity of the transient field in homogeneous medium at 1.9 μs and 27.6 μs,and in layered medium at 1.2 μs and 0.023 ms was discussed.

利用Mur吸收边界条件，选用均匀全空间电偶极源作为初始激发源，模拟了均匀介质中巷道底板岩层内部和层状介质中三维低阻异常体的全空间响应特性，分析了瞬变电磁场在均匀介质中1.9 μs和27.6 μs两时刻的传播规律及在层状介质中1.2 μs和0.023 ms两时刻的传播规律。

Rescuers have saved two Australian gold miners who were trapped underground for two weeks. Todd Russell, 35, and Brant Webb, 37, were trapped in a steel cage when a small earthquake triggered a rock fall in the Tasmanian gold mine where they were working.

营救人员救出澳大利亚一金矿两名被困井下达两周的矿工。35岁的托德·鲁塞尔和37岁的布兰特·维博被困在一个铁笼中，一次小型地震引发了他们所工作的塔斯马尼亚金矿的岩石塌方。

By taking the strategy of uniting geometry with algebra and using the method of minimal value, the relationships of intersection, parallels and perpendicular between two three dimensional spaces in four-dimensional descriptive geometry are investigated and the calculation formula of the distance between two three-dimensional spaces are given.

用形数结合的观点和条件极值法，研究了四维空间的两三维空间的相交、平行和垂直的相互关系计算出两平行三维空间的距离。

Throughout comparing the above estimating methods, we have the following results: the estimators of the moments of the errors does not depend on the random effects, and that of the random effects does not depend on the errors, and then the corresponding asymptotic variances are very simple and optimal; when the random effects are multivariate, we can not construct different estimating equations for the random effects and errors respectively, which results that the asymptotic covariances of estimation are very complex and then the estimating efficiency is bad.

比较上述两种估计法，我们发现：当随机效应是一维的时侯，误差的各阶矩的估计不依赖不可观测的随机效应，随机效应的估计也不依赖误差，因此，估计的渐近方差结构特别简单也是最优的；而当随机效应是多维的，因为随机效应的协变量的影响，我们没有办法针对随机效应和误差的各阶矩分别建立估计方程，这导致所得的估计的渐近方差或者协方差矩阵特别复杂，从而估计的效果不是很好。

This is a perennial difficulty, explains Neil Dodgson, an expert on 3-D screens at Cambridge University."Film-makers have traditionally tended to overdo 3-D effects in order to show off the technology," he says. If the two sets of muscles in your eyes are overworked as a result of keeping up with the 3-D, your brain receives conflicting signals and you begin to feel sick.

这是一个长久性的难题&，一位剑桥大学三维屏幕的研究专家尼格尔森说&如果你眼睛上的两组肌肉为了个跟上三维的画面而过度工作，你的大脑就会接收到不一致的信号你就会开始感到眩晕。

Attacking on 22nd June 1941, Manstein advanced more than 100 miles in only two days and was able to seize two vital bridges over the Dvina River at Dvinsk.

攻击发起于1941年6月22日，在两天的时间内，曼施坦因挺进了超过100英里，并在26日清晨于迪纳斯克夺取了德维纳河上的两座重要桥梁。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！