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The characteristic of fractional order differential equation iscontaining the non-integer order derivative. It can effectively describe the memory andtransmissibility of many kinds of material, and plays an increasingly important role inengineering, physics, finance, hydrology and other fields.

分数阶微分方程的特点是含有非整数阶导数，能非常有效的描述各种各样的物质的记忆和遗传性质，在工程，物理，金融，水文等领域发挥越来越重要的作用。

This text utilizes the stability theory of differential equation, establishes the mathematical model of praying on the relation among the living beings, then according to the characteristic of differential equation group set up, through analyze to its equalization point,discuss the rail line distribution situation and overall stability, studies the dynamic change situation of every species during sufficient long time slot.

摘要本文利用微分方程稳定性理论，建立生物间捕食关系的数学模型，然后根据建立的微分方程组的特性，通过对其平衡点分析，轨线分布情况以及全局稳定性的讨论，研究出各物种在充分长时间段中的动态变化情况。

The second is that the characteristic of time and direction of ME is poor.

二是德育教学的时代性、针对性不强。

Study interest is characteristic of the direction, emotion and motivation.

学习兴趣具有指向性、情绪性、动力性等特点。

In addition, it has also recommended the backgrounds and the newest development trends of the centre district of China city, purpose, main direction and characteristic of research of this text writing.

除此之外，还介绍了中国城市中心区更新发展的背景和最新趋势、本文写作目的、主要研究方向和特点。第二部分是城市中心区更新概述。

In the same time, the author compiled a set of computer program so that one can analyze the direction characteristic of the conformal array by using the PC computer theoretically.

论文中大量的分析结果使我们对机载共形阵的工作情况有了比较清楚的认识，弥补了国内该方面研究的空白。

Then, in the direction of the characteristic of the signal device fault, it works on the course model for realizing fault diagnosis, the composition of the expert system of fault diagnosis, and the method to develop a real system.

然后，针对信号设备故障的特点，对故障诊断实现的过程模型、故障诊断专家系统的构成及其实现方法进行了研究。

There is one characteristic of the present direction of public opinion, peculiarly calculated to make it intolerant of any marked demonstration of individuality.

当前公众意见的方向中有一个特点，特别适于使它对个性的任何显著表现不能宽容。

Product substitutability is the key factor to study the competition between manufacturers in distribution channels,and which is supposed to have characteristic of "double direction" in most previous studies.

产品替代度是研究分销渠道中生产商层次竞争的关键因素，以前大量的研究都是假设两个生产商之间产品的替代度具有"双向"性。

A local urbanized strategy, should base on the local history and the present situation, establish the instruction about urbanized idea and mentality, definite direction and characteristic of urban development.

一个地区的城镇化策略，应该立足该地区的历史与现状，制定指导城镇化的理念和思路，确定城市发展的方向和特色。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。