借助于

Firstly, The sufficient con-ditions of the existence and uniquity of the positive equlibria by applying functional derivative isobtained; Secondly, the global attractability of the positive equlibria is investigated by charateristicroots theory and oscillation theory; Thirdly, regarding the delay as a parameter, conditions of theexistence of Hopf bifurcation and the peridic solution, furthermore, the form of the approximateperidic solution are obtained; Finally, Some specific examples are given and the solution diagrameappears by Matlab.

首先利用导数性质，得到了该模型正平衡态存在惟一性的充分条件；其次，利用特征值和振动性理论得到了该模型正平衡态全局渐近稳定性充分条件；然后，应用Hopf分支理论证明了该模型Hopf分支及近似分支周期解的存在性，并给出了周期解的近似表达式；最后，借助于MATLAB数学软件，举例并绘出了模型数值解的拟合图象，验证了文中定理条件的可行性。

His performance on all these tracks, typically over a backdrop of gauzy major-seventh string pads, provides a lesson in long-form jamming against a steady, sensuous backbeat, with octave passages and a buoyant rhythm feel that echo Wes Montgomery.

他的演奏贯穿所有单曲，其典型特征是以薄纱般的第七弦乐键盘大调作为背景，借助于模仿Wes Montgomery的八度音小节和轻快节奏的感觉，提供了一个如何给稳定的、优美的基调强节奏以较长结构的人为干扰的经验。

But by banding technique, it can be discerned.

但是借助于现代技术，它可以被清晰的识别。

It contains metal; or it is grown or manufactured by the aid of metal; or it will be consumed with the help of metal.

有的产品本身就含有金属；有的产品是借助金属才得以发展或制造出来的；而有的产品的消耗也要借助于金属。

On the one hand, Bely remained to regard symbolism as a means of art, a form of writing which conveyed specific thought and feeling of creative subject through various means of expression; on the other, he also regarded it as a world view, an access for the cognition of the world.

一方面，别雷仍将象征主义视为一种创作手法，一种借助于各种表现力手段来传达创作主体特定思想情感的艺术形式；另一方面，他又将其视为一种世界观，一种对世界的认知方式。

Based on the appealing quality of sounds and colors Bely created rhythmic beauty of external form on the linguistic layer, meanwhile producing the beauty of the internal form with the help of emotionalized intonation and change of narrative rhythm.

作家以声音和色彩为基石，在小说语言层面建立起小说外在形式的节奏美，同时又借助于情绪化的语调以及叙述节奏的变化而建构起小说内在形式的节奏美。

Philosophy is a battle against the bewitchment of our intelligence by means of language.

哲学是我们借助于语言对我们智力巫术的一场战斗。

In this thesis, the limit cycles bifurcated from some kinds of polynomial systems are investigated using the methods of bifurcation theory and qualitative analysis.

本文利用分支理论和定性分析的方法，借助于计算机等辅助工具对几类多项式系统的极限环分支问题进行了研究。

It was big enough now for one no longer to need the binoculars to see it by.

对一个人来说已经足够大了，不再需要借助于望远镜来看了。

Having discussed Wallis'interpolation in great detail, the paper shows that Wallis mainly relied on incomplete induction and analogical inference to obtain his results, an approach which was key to the creation of many important algorithms during the considered period. A comparison between Wallis'method and previous interpolations is then made and the influence of Wallis' thinking style embodied in his interpolation on Newton's invention of binomial theorem is clearly revealed.

通过考察沃里斯的插值过程，指出沃里斯插值法完全是借助于不完全归纳和类比推理得到的，并与过去的插值法做了比较，最后分析了沃里斯插值法对牛顿发明二项式定理的影响。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。