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It is no doubt that numerical analysis and evaluation is extremely necessary.

显然定量的分析和评价十分必要和必须的。

A plan for the solution of a problem; consists of planning and coding, numerical analysis, systems analysis, specification of printing formats, and any other functions necessary to the integration of a computer in a system.

为解决某一问题而作出的计划，包括规划和编码、数值分析、系统分析、打印格式规定以及把计算机结合进一个系统所必需的其它功能。

But in the numerical calculation process, such as numerical differentiation, if we use these numerical methods inadequately, then it may be induced non necessary numerical error, including round off and truncation error.

因而常必须以值方法替代解析解，但是在值计算的过程中，很容引入额外的计算误差，包括舍位误差与截断误差。

Therefore, it is necessary to test the computation results and further modify the computation method based on the comparison between the numerical solution of the linear or non-linear equations and the trial value or the computation results of typical cases.

所以，需依靠对非线性数学方程的数值实验及数值解与试验或典型算例结果的比较和物理特性分析，验证数值计算结果，进一步改进计算方法。

However, a numerical value is necessary so various techniques are used to obtain a quantitative value.

然而这个特性的数值是必要性的，因此要用多种技术及方法来获取这一项数值。

But numerical value simulation technique in the practice engineering is just absent which is very necessary.

因此，关于轻集料混凝土在桥梁中的数值模拟技术的研究已成为必需解决的问题。

At the same time calculation of numerical value is a necessary link solving the linear system of equations, which is a very important question in calculation of numerical value.

数值计算是科学计算中的一个必不可少的环节，而在数值计算中，一类很重要的问题就是线性方程组的求解。

This is the process necessary for numerically analyzing the effect on overall project objectives of identified risks.

这是对已经识别的风险对项目总体目标的影响进行数值分析所必需的过程。

In ancient times at a wedding, six etiquette were necessary for the nuptials.

古代婚姻有"六礼"，这对婚姻成立必不可少。

All of this is a necessary basis for nutation gear design and research.

为章动齿轮传动的设计与研究提供了理论依据。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"