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This paper firstly introduces the basic concept of differential equations.

文章首先给出了微分方程的基本概念。

Firstly, based on the common design notion of powder neutron diffractometer presented by Dr.

在衍射技术中，使用得最多、最广泛的是粉末衍射方法。

The paper firstly introduces several ways of designing the system,then the principle of digital recording, and then the main architecture of the system and the devising of the hardware and software.

本文首先介绍了实现嵌入式录音的几种技术，然后介绍了数字录音的原理，在这之后进行了系统的总体结构设计和详细的软硬件设计，给出了系统调试过程和实验结果。

The high resolution time to digital conversion technique is firstly developed in experimental nucleus physics, and widely used in high energy physics.

高精度的时间数字变换技术原本是从实验核物理中发展、并在高能物理中大量应用的，将这种技术用于遥测三维成像是一种创新性的工作，因此需要做一系列的分析、仿真和试验。

Firstly,based on the analysis of hydrogeological conditions,we built a conceptual model of this area,which divided the diluvium and alluvium vertically into three aquifers and defined their boundary conditions and parameters.

运用地下水模型软件GMS建模，将模拟区剖分为164行、148列4km×4km的规则网格。以2002年~2003年作为模拟期，通过深浅层地下水流场和65个典型观测孔的拟合对模型进行识别，并进行了模拟期的地下水均衡分析。

Firstly, the whole test set was partitioned to several length-fixed blocks. For non-0/1 data block it used dimidiation technique, and for 0/1 data block it used some mark-bits to represent the times of partitioning.

首先将整个测试集划分成若干定长块，对非全0/1块，使用折半的方法划分；对全0/1块，使用标记位来表示划分的次数。

In this paper, a carrier frequency synchronization algorithm based on autocorrelation has been introduced and realized in FPGA firstly, especially the Cordic algorithm and its realization. Secondly, two symbol synchronization algorithm based on crosscorrelation and autocorrelation are introduced and implemented in FPGA, then the comparison between them is made in the view of realization. Besides, the methods of area diplex and pipelining are embodied in implementation scheme of FPGA.

本文首先介绍了一种基于自相关的载波频率同步算法，给出了它的FPGA实现方案，重点讲述了其中用到的Cordic算法及其实现；然后介绍了分别基于互相关和自相关的两种符号同步算法，给出了各自的FPGA实现方案，从实现的角度比较了两种算法的优缺点，并且在FPGA设计中体现了面积复用和流水线操作的设计思想。

Another part is a real example of movie design creation. In the part of theory construction, I firstly directed to the story line of the script, analyzed and coded the text from it. Then, I inverted the result into a culture symbol and made it into the element and the style of the scene space. The final goal is to build the atmosphere which can conform the narrating form.

在理论建构部分，首先针对剧本情节作「文本」的分析与解读，并就所分析与解读的内容藉由文化符码的转化，成为场景空间中具体的元素形式与风格，以营造出符合叙事结构的场景空间氛围。

In Chapter 2, we firstly examine the propagation direction of travelling target waves induced by the localized inhomogeneity.

在第2章中，我们首先研究振荡系统中缺陷对靶波传播方向的选择。

It was shown that the structural parameter was strongly affected by the diameter and depth of tunnels. The structural parameter in vault direction decreased firstly and then increased along with the tunnel depth.

研究得出：围岩的结构性参数与径深和洞径密切相关；随着径深的增大，拱顶方向上围岩的结构性参数均呈现出先减小后增大的规律，存在一个最小值。

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。