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Eaverything happens for a reason.Nothing happens by chance or by means of good or bad luck.

任何事情的发生都是有原因的，没有什么事情是纯粹出于巧合或机会的好坏而发生。

Second, based on the screw theory, the'virtual joint'concept was proposed. By means of this concept, the conventional trajectory planning in Cartesian space was converted in the 'virtual joint'space, that is, the complex trajectory planning in Cartesian space was simplified by utilizing the trajectory planning in the'virtual joint'space.

第二、基于旋量理论提出了"虚拟关节"的概念，利用这一概念可以将传统的笛卡尔空间的轨迹规划转化成"虚拟关节"空间的轨迹规划，也就是说，利用简单的关节空间的轨迹规划方法实现了复杂的笛卡尔空间的轨迹规划。

In the given algorithm, a matrix is first transformed into its Hessenberg form by using row- and column-transformation and the characteristic polynomial can be then determined by means of the formulas and a recursive algorithm given in this paper.

例如，在确定系统矩阵的规范形，在用代数方法判别系统的稳定性，在控制器和观测器的设计等时，就通常需要计算矩阵的特征多项式。

To obtain the function and imbedding properties about relative countable tightness spaces,in this paper the question whether the relative countable tightness space can be adversely preserved by a closed map is studied by means of function and imbedding theories.

为了得到相对可数紧度空间的映射及嵌入性质，借助映射方法和紧化理论讨论了相对可数紧度空间被闭映射逆保持问题及嵌入紧空间问题，得到了相对可数紧度空间被闭映射逆保持的一个充分条件、局部紧的可数紧度空间可嵌入紧空间的几个充分条件以及某一类局部紧空间在任意紧化中不具有可数紧度等结果。

Nuclear interactions induced by cosmic ray high energy particles have been studied by means of a multiplate cloud chamber at 3185 meters above sea level with liquid scintillator as target material.

利用放置在海拔3185米处的多板云室，以液体闪烁体作靶，研究宇宙线高能粒子产生的核相互作用。

We combine two typical kernel functions by means of convex combination. The weighting coefficient and other kernel parameters are optimized by an improved GA.

具体地说，本文主要有以下几个创新点：1、适当核函数的选择和核参数的优化一直是核方法应用的关键和难点。

Hydrotalcite-like containing rare earth europium was synthesized by hydrothermally and characterized by means of XRD,FT-IR,XPS etc.

合成了稀土铕在层晶格骨架中的类水滑石，并经x射线衍射，红外光谱、x光电子能谱进行了表征。

It has been shown that applying bio-pesticides such as Bt by means of pathogen-containing aerosolcreated by a pulsating fogger is feasible,which provide a new convenient way for implementing bio-control in forest on a large scale.

结果表明，脉冲式烟雾载药技术用于Bt生物农药的施放是可行的，这为今后在大面积森林实施生物防治提供一条简便的新途径。

Exempt by means of an official pass or letter, as from customs or other checks1. characterized by directness in manner or speech; without subtlety or evasion同义词:blunt, candid, forthright, free-spoken, outspoken, plainspoken, point-blank, straight-from-the-shoulder2. clearly manifest; evident

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In this paper, the gabbro was investigated by petrologic and geochemical methods and calculated by means of PELE program (a silicate liquid crystallization program).

对该岩体进行了岩石学和地球化学方面的研究，并采用PELE（硅酸岩熔体结晶计算软件）模拟了岩浆结晶过程。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐