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The results of phylogenetic analysis showed that DFR from Hyacinthus orientalis and from Iris x hollandica clustered together firstly ,and then came those from other monocotyledon, dicotyledon came subsequently.

聚类分析表明，最先与风信子聚类合并的是鸢尾，其次与其它单子叶植物聚类，最后与双子叶植物聚类。

Firstly, it is possible to foster the fall of dictatorial regimes, which has been done recently.

第一，促进专制政权倒台是可能的，最近就推翻过专制政权。

The dielectric loss of the PLCT ceramics after polarization increases firstly, and then decreases with increasing frequency.

极化后的PLCT陶瓷的介质损耗，随频率的增加先升高，然后降低。

This paper firstly introduced the dielectric and its polarization mechanism. The concept and present situation of the dielectric and high dielectric materials as well as the CaCu3Ti4O12 materials were introduced in this thesis.

本文首先介绍了电介质及其极化机制、高介电材料的概念、高介电材料研究背景和目前CaCu3Ti4O12材料的研究情况。

Firstly, the reduced dynamic model including motor dynamics is developed for mobile manipulators. The system is then decomposed into four lower-dimensional subsystems by applying diffeomorphism and nonlinear input transformation to the reduced model. The design of the second order dynamical sliding mode controller is then addressed for the output tracking of mobile manipulators.

首先给出了包括驱动电机动态特性的移动机械臂的简化动态模型，然后通过微分同胚和输入变换将其分解为四个低阶子系统，并给出了其输出跟踪的二阶动态滑模控制器的设计方法。

A class of affine nonlinear system of single input-single output is investigated. Firstly, the nonlinear system is transformed into an equivalent linear system through a diffeomorphism transformation. The networked control problems for the delays are constant, stochastic and shorter than a sampling period, and long and stochastic are investigated respectively.

针对一类单输入-单输出仿射非线性系统，首先通过微分同胚变换实现了仿射非线性系统的无反馈精确线性化；然后基于精确化线性模型，分别讨论网络延时为常时滞，随机时滞小于一个采样周期和随机长时滞情况的控制问题。

The differentiability of the initial stresses and elastic constants of the surrounding rocks of tunnels is discussed firstly from the point of view of finite element method.

1引言 输入参数(岩体力学参数、初始应力场)和岩体本构关系不准确是岩土工程数值模拟的两个瓶颈问题[1]。

Differential Algebra related to the idea of AC = BD are presented firstly in chapter two.

最后提出了C-D分离变量的概念，予以形式分离变量法新诠释。

Firstly, illustrate the fundamentals (differential-integral optimizing theory) of the category of algorithms briefly in the sight of differential and integral calculus. Then two examples of the category of algorithms are listed.

首先从函数逼近的角度论述了数值积分与全局最优化的关系，随后从微积分的基本原理和定积分的定义出发对该类算法的几何意义和数学基础作了简要论述；在此基础上给出了该类算法的几个具体实现。

Firstly, a differential pressure air circuit system is employed and designed in this research.

设计了差压式气路测量系统，设计制造了实验用轴向式气动测头。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。