首先

Therefore, this chapter, in the first place, discusses the axiomatization of theory ofevolution and introduce in detail Williams' axiomatic system about evolution. Insecond place, it discusses the dissipative theory and the hypercycle theory. Thisdiscussion is actually about a kind of semantic which is the molecular model.

因此，在这一章，首先，对进化理论的公理化形式进行讨论，详细介绍了Williams进化论的公理系统；其次，讨论耗散结构理论和超循环论，实际上是讨论了关于进化论的演绎公理系统的一种语义或分子层次的模型。

Firstly, we propose an axiom system by a language of two rank and some axioms.

首先建立了一个RBAC的二阶语言，与一组公理形成了一个公理系统。

With regard to the central part, the actual state of coordinate axis is analyzed first, then the theory ofthe projection method is introduced. On the basis, the method of identifying coordinate origin ispresented.

在本文的核心部分——曲线识别中，文章首先从分析曲线图中坐标轴的分布情况出发，引出投影法，在此基础上提出了利用投影法识别坐标原点的理论。

Because of human's head likes an ellipse with longer vertical axis and shorter horizontal axis, we set the position to be a candidate of vertex of minor axis if the vertical projection of vertical edge is high enough in order to speed-up the template matching for ellipse detection.

首先利用Sobel边缘侦测与连续影像相减，再将两者结果交集取出前景物像素；由於头部有类似垂直轴长水平轴短之椭圆的特性，因此将垂直边缘之垂直投影量较高的位置当作椭圆短轴的可能端点，以增进用样板比对做椭圆侦测的效能。

This paper deals with the aberrations of optical systems consisting of cylindrical components with their axes, parallal and having a common axis of symmetry.

本文首先由柱面系统中描写光线所须的参数和对称性，确定了同轴柱面系统的独立象差数是八个，而对无限远物体而言则只有六个。

First, assuming that an individual gets serious ill after eating meat processed by Aylmer Meat packers Inc.

首先，假设有人在食用了Aylmer Meat packers Inc。

In this paper, the military secrect communication is discussed firstly, in which m-sequence and Des encryption algorithm and their fulfillment in AYR embedded-microchip controller is discussed.

文中首先讨论了军事保密通信，其中讨论了m序列和des加密算法，以及它们在单片机中的实现。

In both examples, attempts have been made to break the azeotrope between BuOH and BuAc to achieve high purity product.

首先第一根是传统蒸馏塔，其后接著一根反应蒸馏塔来打破共沸组成。

Firstly, the secondary absorb measurement mechanism is designed based on the absorbing spectrum of azide methemoglobin, and the concentration equation is derived.

首先，基于叠氮高铁血红蛋白溶液的吸收光谱曲线设计了二次吸收测量机理，并明确了浓度计算公式。

Its purpose is to seek the law of the target RCS varying according to its azimuth.

首先简要评述前人在目标电磁散射特性以及目标识别领域的研究方法和途径。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。