有必要对加速度给出一个严格的定义，加速度,作为一个矢量,是速度的一阶导数。
So, the definition will take effect. The acceleration is as a vector, and the acceleration vector is just the derivative of a velocity vector.
他说：“三阶干扰项的存在将对理论有巨大影响——动摇量子力学的核心，”他说。
"The existence of third-order interference terms would have tremendous theoretical repercussions - it would shake quantum mechanics to the core", he said.
FARC游击队的规模已从2001年高峰期的二万名战士减少了一半，而且失去了一些领导干部(2009年有十几位中阶指挥官丧生)。
The FARC has shrunk to less than half its 2001 peak of 20,000 fighters and has lost several of its leaders (a dozen mid-level commanders were killed in 2009).
FARC游击队的规模已从2001年高峰期的二万名战士减少了一半，而且失去了一些领导干部(2009年有十几位中阶指挥官丧生)。
The FARC has shrunk to less than half its 2001 peak of 20, 000 fighters and has lost several of its leaders (a dozen mid-level commanders were killed in 2009).
在一个建筑物理找到一段有四阶台阶以上的楼梯。保证你的脚总是完全踏在台阶上了，接着退下来、作为舒缓运动。E。
Find a stairwell in a building with at least four full floors. Ensure your whole foot lands on each step and walk back down during recovery periods.
“公平”和“效率”两者本身并不是在同一个价值位阶之上的概念，只是在当前的经济社会环境下两者有相互冲突的现象。
"Fair" and "efficiency" are not the concept in a same value position, but they just have conflicting phenomenon in current economic social environment.
为使第二阶模态频率避开发动机一阶惯性力频率，文中对扶手架的质量、刚度进行局部修改，结果使手把振动有较大幅度的下降。
To separate these frequencies, we make a local modification to mass and stiffness of the handle and results in the vibration on the handle of walking tractor to reduce considerably.
有一位中阶经营主管因为听了他的医师指示必须要做一些运动。
A middle management executive has to take on some sports, by his doctor's.
阻尼比是二阶系统的一个重要的特征参数，它对二阶系统动态特性有较大的影响。
The damping ratio is an important characteristic parameter in a second-order system, which has great effect on the dynamic characteristic of the second order system.
分析了华南东部茅口亚统和吴家坪阶的岩相古地理分区及厚度变化，在此基础上对几个有争论的问题进行了讨论。
The Lithofacies paleogeography and the thickness variation of Maokouan Subseries and Wuchiapingian Stage in east part of South China are analyzed and some questions in dispute are discussed.
目的研究一阶具有分段常数变量的脉冲微分方程的解的性质。
Objective to investigate characters of the solution to first order impulsive differential equations with piecewise constant arguments.
的n阶有向无环图的拓扑排序的可能的最大数量是多少？
What is the maximum number of possible topological sorts of N-order Direct Acyclic Graph?
阐述利用最新提出的同伦分析方法求解有正阻尼的强非线性振动方程，得到了该方程的六阶近似解析解。
In this paper, the sixth-order approximate analytical solutions of the strong nonlinear oscillation with positive damping are obtained by using newly developed homotopy analysis method.
力学理论有一个显著的特点，它可以描述所有的运动而不需涉及二阶以上的导数。
It is a remarkable feature of the theory of mechanics that all motion can be described without reference to derivatives higher than the second.
新疆分量式钻孔应变异常类型有多种，阶变型异常是其中重要的异常类型之一。
There are five abnormity types of component-type borehole strain in Xinjiang, among which the more important is the stepping change type.
还给出一些有高阶劳厄区的电子衍射谱的实例，图上零阶和高阶的各班点指数均由计算机自动标定。
Some examples are given in which the electron diffraction patterns with Nth order Laue zone are indexed automatically by computer.
其科级分类阶元的分布型为10类。其中，以旧大陆热带、亚热带和温带分布型为主，次类型者有9科；
The families of these mammals were divided into 10 categories, in which the old-continent-tropic-subtropic and temperate zone is the largest type with 9 families.
本文对圆筒混合机内物料的运动进行了较全面的分析，给出了物料运动的一般方程。可为圆筒混合机设计、使用提供有阶值的参考。
The material movement in the drum miner is analysed, the general formula of the material movement, which can be used to design such devices, is presented.
本文研究当极限方程有奇性时四阶线性常微分方程的柯西问题解的渐近式。
This paper studies the asymptotic expression of solution of Cauchy's problem for a forth order equation when the limit equation has singularity.
采用这种方法控制一具有三阶调节对象的系统。
This control method is applied to the controlling of a system with three order adjustment object.
对江西省信丰县铁石口剖面晚二叠世长兴阶至铁石口阶下部的牙形石动物群有了新的认识。
A detailed research has been worked on the Late Upper Permian conodont fauna of Tieshikou section in Xinfeng area, Jiangxi Province.
它里面的每一个楼梯有91级步阶，加上在殿堂大门的一级，总数是365级。
Each staircase has 91 steps, which, added to the single step at the main entrance to the temple, amounts to 365.
计算表明分子1具有较大的二阶非线性极化率。
The calculated results indicate that molecule 1 has higher second-order nonlinear optical polarizability.
你有一堆中阶主管以前是在知名企业上班(而且还刚好都是那些民生消费品牌)，而且他们老是喜欢找开会，而且一直指定谁谁谁要当专业的负责人。
You have a layer of middle management who worked at big - name companies usually consumer goods who like to call meetings and designate "project leads." I experienced this first hand.
介绍了针对幅值突变信号及一阶微分有突变的信号利用多分辨分析进行突变征兆提取的理论及方法，并给出了仿真实例。
The extraction theory and method of fault signal jump omen based on multi-resolution analysis are introduced, and a simulation example is presented.
这对于理解过渡金属原子簇化合物内的电子转移对光学激发的作用以及用来设计新的无机-有机杂化二阶非线性光学材料有较大的帮助。
The results are helpful to understand the relationships between charge transfer and optical excitation, and to the design of novel organic-inorganic hybrid nonlinear optical materials.
在边界提取时选取有一定间距的像素分别计算三原色梯度，把其中绝对值最大的梯度作为边界存在的判据之一，同时根据二阶导数符号变化提取边界。
Third, the gradient between two pixels that have certain distance was calculated in three color components respectively, and then the maximum of gradients of the three was attained.
本文的主要结论有：（1）二次二阶矩法是以一次二阶矩法为基础，并对一次二阶矩法的计算结果进行二次修正，在多数情况下有着更好的计算精度。
The main conclusions obtained in this thesis are as follow:(1) Based on FOSM, Second-order second-moment method modifies the results of FOSM, and has better calculation accuracy.
在这部电视剧里有三个主要角色，性格各异，年龄不同，且各自处于同志生活里各种各样的阶点。
In the series there are three main characters, which are nothing alike, all different ages, and all at various points in their gay life.
在这部电视剧里有三个主要角色，性格各异，年龄不同，且各自处于同志生活里各种各样的阶点。
In the series there are three main characters, which are nothing alike, all different ages, and all at various points in their gay life.
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