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Firstly, the principles and characteristics about column type vector hydrophone are studied in this paper.

首先，本文从理论上对柱形矢量水听器的工作原理及其特性进行了分析。

In this paper, firstly the elimination tree theory is introduced in brief, and the structure of Jacobian matrix is determined by use of symbolic factorization; then by use of sparse vector method each column of lower triangular matrix L and each row of upper triangular matrix U are solved.

介绍了消去树理论，并采用符号因子分解技术确定雅可比矩阵的结构，然后采用稀疏向量法求取L阵的每行和U阵的每列。

Methods Firstly, 2-D matrix X with each ECG-cycle as a column vector was constructed. Secondly, the principal components of X based on Karhunen-Loeve Transform were gotten to reconstruct X from the first eigenvector of XXT.

首先以逐拍心电波形为列矢量构造二维矩阵X，再通过KL变换得到X的主分量，然后由X的最大特征向量重构X。

Green in colure, pretty in sharp, fragrant in fragrance, Delicious in flavor, so when we sample tea, see firstly, smell secondly, sample thirdly.

所以我们品饮龙井要一看、二闻、三品味。

In this dissertation, firstly, the theories and methods about chaos control and chaotic optimization are studied. Based above, some new approaches for chaos control and chaotic optimization are proposed. Furthermore, the application of chaotic optimization for test generation of combinational logic circuits is investigated in detail, and new methods for test generation are proposed based on chaotic optimization.

本论文在对混沌控制与混沌优化的相关理论和方法进行较为全面、系统的研究基础上，提出了一些新的混沌控制与混沌优化方法，并针对混沌优化与混沌神经网络在组合电路测试生成问题中的应用展开了详细研究，提出了基于混沌优化的组合电路测试生成方法，得到了有价值的成果。

Based on this, this thesis firstly explores the meaning, characteristics and the theoretical basis of the merit system, and brings forward the design requirement of the modern merit systems index combined with the modern administration system.

基于此，本文首先从对公务员绩效考核制度的内涵、特征及其理论基础的考察入手，结合现代行政管理体制，提出了现代公务员绩效考核指标的设计要求。

President Roosevelt wrote back immediately ,saying ,Dear friend ,thank you for your letter to comfort me .I'm all right now ,I think I should thank God ,this is because of the following three reasons :firstly ,the thief only stole things from me but did not hurt me at all ;secondly ,the thief has stolen some of my things instead of all my things ; thirdly ,most luckily for me ,it was the man rather than me who became a thief

罗斯福总统很快就回信说："亲爱的朋友，谢谢你来信安慰我，我一切很好。我想我应该感谢上帝。因为：第一，我损失的只是财物，而人却毫发未损；第二，我只损失了部分财物，而非所有财产；第三，最幸运的是，做小偷的是那个人，而不是我。。。"

Hearing this,one of Roosevelt's friends wrote to him and advised him not to take it to his heart so much. President Roosevelt wrote back immediately, saying,"Dear friend,thank you for your letter to comfort me.I'm all right now. I think I should thank God.This is because of the following three reasons: firstly, the thief only stole things from me but did not hurt me at all; secondly,the thief has stolen some of my things instead of all my things; thirdly,most luckily for me,it was the man rather than me who became a thief...".

美国总统罗斯福一次家里失窃，丢了许多东西，一友人写信安慰他，他的复信很有意思："我的朋友你好，我现在很好，我想我应感谢上帝，原因有三，一是盗贼仅仅拿了东西而我本人完好无恙；二是我失去的仅是部分财物而非全部；三是最重要的，幸运的是，那个人是一个盗贼，而不是我。。。。。。。。"。

Once President Roosevelt's house was broken into and lots of things were stolen.Hearing this, one of Roosevelt's friends wrote to him and advised him not to take it to his heart so much. President Roosevelt wrote back immediately, saying,Dear friend, thank you for your letter to comfort me. I'm all right now. I think I should thank God. This is because of the following three reasons: firstly, the thief only stole things from me but did not hurt me at all; sec ......

好久没有时间静下来好好的审视一下自己的BLOG，也没有用心去分辨它的各个版块与功能，直到昨天才看到居然自己也有个留言板，上面有很多朋友给我留言了，只是自己一直都不知道它的存在，真是汗颜，对不住了各位同学，所以今天百忙中静下心来好好的给各位同学一个回复，我看到它们了，并且很感谢你们的留言，下面一一回复吧

Firstly,I have searched history of development of comics and their basic information.

首先，我先找了许多有关漫画的发展史与其基本资料。

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。