对称面

Methods On the symmetrical plane of the double-Gauss lens with 1:1 magnification,the Fraunhofer diffraction of the object surface could be formed.

方法在双高斯1：1制版镜头的对称面上形成物面的夫朗和费衍射，并使物面与茶形散斑屏重合，使得各物点均以狭缝状的光束通过透镜组在记录介质面成像。

It appears as a single-shelled icosahedron with 112 characteristic two-layer spikes.

该病毒仅有单层衣壳，病毒离子呈二十面体对称，二十面体的十二个顶点均有双层突起。

The structures and stabilities of the ground-states for Cu13-nAgn clusters have been studied by Gupta model potential based on tight binding second moment approximation in combination with a genetic algorithm. It is found that the lowest energy structures of the pure clusters (n=0,13) are perfect icosahedron, and the structures for the bimetallic clusters (n=1～10) have stable structure which are slightly deformed with respect to the perfect icosahedron, The Cu atom prefers to occupy the center of the clusters with higher coordination numbers.

在混合团簇基态结构优化的遗传算法方案中增加了交换算子，结合Gupta紧束缚模型势研究了Cu13-nAgn团簇的最低能量结构，选择合适的交换和杂交概率，可有效地提高优化效率，优化结果表明，Cu13和Ag13是全对称的二十面体，n=1～10的混合团簇能形成稳定结构，其构型是在二十面体基础上发生畸变，Cu原子趋于处在团簇中心，随着Ag原子数目的增加，原子间的平均距离单调增加，团簇的结合能单调减小，Cu2Ag12和CuAg12只存在亚稳结构。

Polypodioideae are morphologic uniform; they are monolete, bilaterally symmetric, ellipsoidal in polar view, bean-shaped in equatorial view, and with or without perispore. The surface ornamentation is regularly verrucate.

研究结果表明，该亚科植物孢子形态较为一致，均为单裂缝，两侧对称，极面观为椭圆形，赤道面观为豆形，具周壁或不具周壁，外壁正面观均为较整齐的疣状纹饰。

It was shown that the 3D deformation in the tunnel at soft rock was obvious at F7 fault and phyllite section, with the characteristics of large deformation and longitudinal displacement developing in the opposite direction of work face and being stable at a distance about 2.0 times of tunnel diameter from the work face. And the 3D displacement of tunnels at F7 fault zone developed in an uneven symmetrical way, while there was good consistency for 3D deformation at slate section. Furthermore, there was a mutally verifying relationship between 3D deformation and ground stress distribution of tunnel region.

结果表明，F7断层和千枚岩地段软岩隧道三维位移十分明显，具有隧道大变形特性，其纵向位移背离开挖面方向发展并在相距开挖面约2.0倍洞径时趋于稳定状态；F7断层地段隧道三维位移呈不均匀对称地发展变化，而板岩地段三维位移变化的一致性较好；隧道三维变形规律与隧道区域地应力场的分布存在相互印证关系。

Preoperatively and postoperatively computed tomographic scanning was performed in every patient. For the CAD treatment group, firstly, the 3D graph of the patient's skull was built based on the CT data using the reconstructing function of Mimics 8.11. Then the 3D file was imported to Geomagic 4.0. The injury lateral was resected and replaced by the mirror of the intact side, so an intact skull was generated at last. Consequently, a model was manufactured in a technical machine. The last step was to prebend the titanium mesh on the model.

CAD/CAM治疗组是利用术前诊断CT，将DICOM格式CT数据输入图像处理软件Mimics8.11，由软件生成颅颌面骨STL格式的三维图像文件，应用另一个图像处理软件Geomagic4.0读取该文件，并应用镜像工具以中线为轴线生成健侧半的镜像，最终得到双侧对称的颅颌面模型，将该图像信息输入快速成型系统，通过逐层树脂堆积，生成树脂头模。

The characters of the singular point of the visible contour line of a concave rotative surface and its corresponding projection are analyzed on condition that the projection of the contour line is smooth near the singular point , the shape of the visible contour line of a concave rotative surface near the singular point is further studied.

对凹回转面可见轮廓线的投影在奇点附近仍光滑的情况下，分析了可见轮廓线本身与奇点对应点处的曲线特征以及可见轮廓线在其对称平面的投影图上与奇点对应的点的特征。对凹回转面可见轮廓线在奇点附近形状作了进一步的分析与研

A series of homemade needles and guides for underlying guided suture was used to treat the skin laxity in 42 cases of facial paralysis and 15 cases of facial aging science 2006. All of them were used the suture technica of deep-seated suspensory . Results 40 in 42 facial paralysis cases obtained satisfactory effect, and the effect of them were steady in 6 to 12 months followed-up .

自2006年以来我们采用自行设计的李氏埋没导引缝合针和李氏埋没导引缝合器，以埋没导引的方法，通过深部组织缝合悬吊的技术治疗面神经瘫痪遗留的面部表情不对称42例，其中完全性面瘫31例、部分性面瘫11例；治疗面部老化造成的皮肤松垂15例。

Computationalresults indicate that the no-planar trans-benzanilide is the most stable structure. The spectra indicate that the Franck Condon region photodissociation dynamics have multidimensional character withnine activemodes. The intensity of υ24 mode in methanol is much stronger than that in acetonitrile. Compared with fatty amides and benzamide, phenyl substitution for H atom on-NH2 group makes C=O solvent effects disappear.

结果表明，苯甲酰苯胺的非平面反式结构为最稳定结构；在Frank-Condon区域内，苯甲酰苯胺主要由9个活性振动模组成；其中ν24（苯环上C＝C不对称伸缩振动和CCH的面内弯曲振动，NH面内弯曲振动）振动模在甲醇溶剂中的强度远远大于其在乙腈的强度；与脂肪酰胺类化合物和苯甲酰胺的研究结果比较发现，苯基取代－NH2上的H原子使得C＝O不再具有明显的溶剂效应。

The metal ions of the dinuclear copper complex of [Cu_2_2Cl_4] are linked by two N~1,N~2 1,2,4-triazole bridges,and the central Cu ions have distorted trigonal bipyramid geometries. The central Cu ion of [CuL22]·H2O has a centrosymmetric and distorted tetragonal-octahedral geometry. The metal ions of the dinuclear manganese complex of [Mn_2L_2_2Cl_2(H_2O)_2] are bridged by two chlorine atoms, and the central Mn ions have distorted tetragonal-octahedral geometries. Part III.

配合物[Cu_2_2Cl_4]是通过配体L的1，2，4-三唑环上两个氮原子(N~1，N~2)桥联形成的双桥双核配合物，每个中心铜离子都具有畸变的三角双锥构型；配合物[CuL22]·H_2O的中心铜离子具有中心对称的畸变八面体构型；配合物[Mn2L2_2Cl_2(H_2O)2]是通过两个氯原子桥联形成的双桥双核配合物，每个中心锰离子都具有畸变的八面体构型。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷