四体的

Using a projection called anamorphosis to create the illusion of three dimensions when viewed from the correct angle, these four artists create some of the finest 3D pavement illusions we've seen.

使用投影称为变体，创造出三个方面的幻想当从正确的角度看，这四个艺术家创造出最优秀的3D领域，我们已经看到一些路面的幻想。

Studies on four novel classes of glycosyl donors for the stereoselective synthesis of 2-S-2-deoxy-β-glycosides, via 1, 2-migration and concurrent glycosidation.

一、发展了四种糖基给体，通过硫的1，2—迁移，并同时进行糖苷化的方法，立体专一的合成了一些2位硫代β糖苷。

In chapter 8, the complex of n-dimensional and geometry models of n+2 points are analyzed. The algorithm of high dimensional Delaunay triangulation is discussed.

第八章以四维空间为例分析了n维空间的单纯体构造和n+2个点的空间几何构型，探讨了高维空间的Delaunay三角化算法。

The newly found species, Tiktaalik roseae, has a skull, a neck, ribs and parts of limbs that are similar to four-legged animals known as tetrapods, as well as fish-like features such as a primitive jaw, fins and scales.

最近发现的种类， Tiktaalik roseae，有一块头骨、一个脖子、与四足动物tetrapods类似的肢体的部分肋骨，以及似鱼功能，例如一个原始下颌、飞翅和鳞状体。

Cytoplasmic actin microfilament systems were localized in the freshly isolated onion protoplasts of bulb parenchyma cells using TRITC labelled phalloidin probe in the present study.

使用四甲基罗丹明标记的鬼笔环碱探针，以新分离的洋葱鳞茎薄壁细胞原生质体为材料，观察了细胞胞质肌动蛋白微丝骨架的结构与形态。

Due to the demand of the large angle attitude control, the unit quaternion is used to describe the spacecraft attitude in this thesis.

针对飞行器以姿控发动机作为姿控执行机构时的大角度姿态运动需求，本文采用单位四元数作为弹体姿态描述，考虑到姿控发动机布局对姿态控制的影响，直接以姿控发动机推力作为系统的控制输入，利用反馈线性化方法，将原非线性系统转化为一个六阶线性子系统和一个一阶内动态子系统。

Quantitative analysis of the EXAFS spectra showed that the microscopic structure of Znon anatase TiO2 is four coordinate complex, and there are at least two types of bonding based on the average Ti-Zn distances in the second sphere. Two different geometry configurations of single-corner and double-corner for adsorption on the (101) surface cluster were calculated using DFT method.

EXAFS结果表明，Zn在吸附时由自由水合状态下的Zn-O六配位八面体结构向四配位四面体结构转化，中心Zn原子的第二配位层存在两种不同的Zn-Ti距离（R1=0.371和R2=0.332nm）。

In order to study the reasons and preventive measures of dynamic disasters such as shock bump and the destroy of rock mass in mining engineering resulted from the outburst of mash gas and coal during mining,stress-relieving measurement and temperature and confining pressure calibration were made with improved CSIRO cells at 4 measurement points in Datong mining area .

为了研究大同矿区在煤炭开采过程中煤和瓦斯突出形成的冲击地压、采矿工程围岩破坏等动力灾害的形成原因及其防治对策，采用改进型CSIRO空心包体应变计，对大同矿区进行了四个测点的应力解除测量实验以及室内温度标定和围压率定实验。

A conclusion that the symmetric product of a self-conjugate matrix is still a self-conjugate matrix was obtained.

给出实四元数体上矩阵对称积的定义，得到了自共轭矩阵的对称积仍是自共轭矩阵的结论。

The Laser Raman Microprobe study of these quenching melts has obviously shown that within the high frequency region (900~1200cm-1), the higher the pressure, the smaller the frequency of T-Onb symmetry and antisymmetry stretching vibration.

其激光拉曼微探针研究表明：随压力增大，T-Onb在高频区(900~1200cm-1)的对称和反对称伸缩振动频率明显减小；过铝质熔体中存在六配位铝，且随压力增大，铝的配位数可能有从四配位向六配位转化的倾向。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。