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Network analysis can be realised by means of the graph structure, and faces management is allowed by the planar characteristic of the graph: for any given oriented arc, there is only one face on the right, and one face on the left.

网络分析可以通过图的结构来实现，同时，图的平面特征允许面的操作：对于任意的有向弧，只有一个面位于它的右边，一个位于左边。

The formula for area of ellipsoidal triangle on earth ellipsoid by means of geodesic coordinate is derived in this paper. It is showed that the primary term is identical with the formula for area of plane triangle by planimetric rectangular coordinate in three angular point, while the expression of remainder terms has also regularity of its form. The presented formula can be applicable also to convex polygon on earth ellipsoid.

本文推导出用三顶点的测地坐标计算地球椭球面上三角形面积的公式，公式表明，其主项的表示式与按平面坐标求面积的计算式完全一致，而附加项的表示式亦有规律可循，因此该公式的适用范围可由椭球面三角形推广至椭球面上任意凸多边形。

By means of electric potential method and anodic stripping voltammetry , the trace Cd~(2+) in the soil samples of rich iron content can be determined by a 883—model polarograph, with the mercury membrane electrode of silver base sphericity as the indicating electrode and a large area of sheet—silver electrode as the reference electrode.

本文应用电位法，采用银基球型汞膜电极为指示电极，大面积银片电极为参比电极和883型极谱仪，阳极溶出法测定大量铁存在下的土壤样品中痕量镉。

Potato breeding for late blight resistance was one of the earliest practices mankind used to combat plant pathogens by means of genetic improvement, but the disease has not been controlled by resistance breeding so far.

马铃薯抗晚疫病育种是通过遗传操作来抵抗植物病害的最早的人类实践之一，但至今收效甚微，从野生种导入的抗病基因在田间很容易失效。

The particle size distribution and appearance of slag powder ground by ball mill and vertical mill was studied by means of SEM and LPS.

通过扫描电镜和激光粒成分析仪研究了球磨和立磨粉磨矿渣粉形貌和粒度分布。

Aiming at complicated computing and difficulty of being realized when extending single sensor PHD filtering to the multi-sensor case by means of probability generating function, a multi-sensor multi-target sequential particle-PHD tracking algorithm is proposed based on the thought of sequential filtering for a centralized fusion system. The algorithm chooses the importance density function with regard to every sensor, and updates sample particle of every sensor layer by layer.

当采用概率母函数将单传感器PHD滤波推广到多传感器情形时，针对计算繁琐，难于实现的问题，本文基于集中式融合系统的有序滤波思想，提出多传感器、多目标有序粒子PHD跟踪算法，该算法通过选取与各传感器相关的重要性密度函数，层层更新各传感器的采样粒子，达到多传感器多目标有序PHD跟踪。

From the concept, it does the exact opposite of a camera: instead of recording an image of the environment by means of an orthographic or perspective projection, projective texture mapping projects an image onto the environment, by using a matrix very similar to the one a camera uses.

从这个概念上，它与摄象机正好相反，不是通过正交或者透视投影来记录环境的图象，而是把图象投射到环境上，通过使用类似于摄象机使用的矩阵。

This fluidity exceeds even the inconsistency of the sands of the Quartier Saint-Georges, which could only be conquered by a stone construction on a concrete foundation, and the clayey strata, infected with gas, of the Quartier des Martyrs, which are so liquid that the only way in which a passage was effected under the gallery des Martyrs was by means of a cast-iron pipe.

这种流动性的土壤较之圣乔治区的流沙还更不牢靠，流沙只在石块加混凝土筑成地基后才能加以克服；而流动性的土壤也不比殉教者区恶臭的有沼气的粘土层牢靠，这粘土稀薄到使殉教者区地下长廊的沟道只能用一条铸铁管来沟通。

Methods:The expression of CK20mRNA in portal venous blood from 30 colorectal cancer patients was detected by fluorescent quarto RTPCR,and the results of CD44v6 and PCNA in colorectal cancer tissue were determined by means of immunohistochemistry,and then compared with control groups through statistics analysis.

应用荧光定量RTPCR法检测50例大肠癌患者回流门静脉血中CK20mRNA，同时应用免疫组织化学方法测定大肠癌癌组织中CD44v6、PCNA的表达，并与对照组比较。

Its operating principle is analyzed by means of matrix formulation, and the result indicates that the thickness of the quartz plate along the crystal axis will be exactly obtained by accurate judgment of the transmission curve of a quartz plate sandwiched between two crossed polarizers.

利用光学矩阵方法对测量原理进行了分析，指出通过测量由两个正交的偏光镜和待测石英晶体所组成的系统的透射曲线就可以精确计算出待测石英晶体的厚度。

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