三

After the approach always look two or three turns ahead if you are on the steeps, two or three bumps ahead if you are in a mogul field, or two or three trees ahead if you are on a glade run.

该方法后，总是看两三个轮流提前如果您在五香，八角，两个或三个提前碰撞，如果你在一个领域的巨头，或两三个树，如果你前面的空地上运行的。

In the process of immigration of eastern Sichuan and western Hubei, at least three issues are worthy of noting: one, the settlers had a difficult trip, life was unstable and crafts was extremely difficult in the mountain region in early time; two, Land disputes are more common in initial time of immigration, occupying boundary, subleasing, reselling and looting land often caused fights even murder, which shows early highly complex relation of immigration in community; three, immigrants plays a very important role in the development of local economy. If the local economic development can be divided into four stages, the fourth period (that is, from the middle of the 18th century to the 19th century) is the most important period for immigration, is the period of fastest development of economy and is the period of the local economic development the largest impacted by immigrants.

初期移民社会至少有三个问题引起本文注意，首先、移民们行程艰难，到达深山地区初期的生活很不稳定，劳作极其艰辛；其次、土地纠纷是初期移民社会较为普遍的现象，蒙混占界、转租转卖、抢占土地往往引起群殴甚至酿成命案，初期移民社会围绕土地争夺而展开的各种关系极为复杂；三、移民给当地社会经济带来了较大的变化，如果可以将唐宋至十九世纪末当地经济的发展分为四个时期，那么，第三个时期(即十八世纪中叶到十九世纪)是移民的重要时期也是当地经济发展最快的时期，移民对经济发展变化的影响是很大的。

The similar nicotinoyltrifluoroacetones are synthesized from acetylpyridine and ethyl trifluoroacetate through Claisen reaction.The influnences of alcoholic natrium,reaction temperature and solvent on reaction yield is studied.The subliming method is improved.

本文以乙酰吡啶和三氟乙酸乙酯为主要原料，利用克莱森酯缩合反应，合成了三种相似结构的吡啶甲酰三氟丙酮化合物，考察了碱性试剂醇钠、反应温度和溶剂等因素对反应产率的影响，改进了纯化产物的方法。

In the three dimensional seismic survey research process to HuoJitu well field in DaLiuta coal mine, it used weakness before superimposes、three dimensional after superimposes weakness followed with noises and other technics to dispose with the primary earthquake section planes, which enhancing three dimensional earthquake data body signal-to-noise ratio.

在对大柳塔煤矿活鸡兔井田进行三维地震勘探研究过程中，对原始地震剖面采用叠前面波衰减、三维叠后随机噪音衰减等新技术加以处理，提高地震三维数据体的信噪比。

The main contents on visualization of this paper involve the opening figure base of OpenGL and the technique of Java3D and so on. And we have achieved three dimensional modeling on the base of TIN from the data of DEM. We also have achieved the three dimensional render and visualization superposing the the characteristics of topography from DEM.

本文在可视化的主要研究内容为，采OpenGL开放图形库和Java3D技术，实现了数字高程模型的三角网地形模型的三维建模，并实现了将流域特征信息与三维模型相叠加的动态三维渲染显示。

It is simple, fast and precise to measure objects three dimensionally through structured light. It is also fast and exact to reconstruct the 3D shape of object by triangulating the 3D data points.

利用结构光可以简单、快速并且精确地对被测物体进行三维测量，对获取的三维数据点集进行三角剖分，可以快速准确地重建被测物体的三维形状。

It is also fast and exact to reconstruct the 3D shape of object by triangulating the 3D data points. The study in this thesis is about the algorithm of obtaining 3D data on the basis of range image obtained by structure light and the algorithm of object reconstruction.

利用结构光可以简单、快速并且精确地对被测物体进行三维测量，对获取的三维数据点集进行三角剖分，可以快速准确地重建被测物体的三维形状。

Harry, who could see a huge Dudley tantrum coming on, began wolfing down his bacon as fast as possible in case Dudley turned the table over.

达德里想了一会，好像想得很辛苦，最后他慢吞吞地说，&那么我会有三十……三十……&&三十九件，宝贝。&

A double or triple three, then, is a combination of simpler types of corrections, including the various types of zigzags, flats and triangles.

因此一个双三或者三三，是一个对更简单调整浪的组合，这些简单调整浪包括了各种类型的锯齿、平台和三角型。

Aiming at three-dimensional construction of point object,lease square-method is usually used in traditional method.

中文摘要：双目立体视觉研究利用二维投影图像恢复三维景物世界的问题，其中三维重构是立体视觉测量过程的主要组成部分之一，是从二维图像恢复三维景物的关键环节。

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。