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Recently, it has been found that some inducers such as retinoids acid and yeast containing Se can prevent and reverse PLGC of rats to some extent. But all of these data are obtained from animal experiments, information of clinical research has not been reported. Natural β-carotin and folic acid can reverse dysplasia and intestinal metaplasia of gastric mucosa to some extent, but these effects are required to be further investigated.

晚近发现维甲酸类诱导分化剂及硒酵母对大鼠PLGC演变至胃癌有一定阻抑预防和逆转治疗作用，但均仍停留在动物实验阶段而未用之于临床；天然β-胡萝卜素和叶酸干预治疗后能一定程度地逆转胃粘膜异型增生和肠化生，值得进一步深入。

Zhuang choice of food is not very strict taboo, in the past some people do not eat beef, worship and love may be because cattle; some people eat dog meat ban, some people describe as a rare, tonic.

壮族对食物的选择并没有十分严格的禁忌，以前部分人不吃牛肉，可能是崇拜和爱惜牛的缘故；有些人禁吃狗肉，有些人却将之视为珍品、补品。

We have published some music files, in MIDI and MUS formats. We have published the Human Genome. We have published pictures of the prehistoric cave painting from the south of France. We have published some video files and some audio files, including a Janis Ian track and readings from public domain books.

我们还发行了一些MIDI和MUS格式的音乐作品、人类基因组、法国南部的史前洞穴壁画的图片、一些视频文件和音频文件，其中包括一张Janis Ian的唱片和一些进入公共领域的有声读物。

Some meet at work, some at school, and some in the chatroom on the Internet!

有的是在工作时相遇的，有的是在学校里认识的，也有的是在网上的聊天室⑥认识的！

Some are covered with overlapping chitinous plates; some have smooth hides or snakelike eye tentacles; some have crustacean joints.

有的身体覆盖着厚骨板，有的外表光滑，有的眼梗像蛇一样，有的由甲壳拼接而成。

Some of these are to be given school-improvement partners to chivvy them into raising their game, some taken over by better-performing neighbours, and some closed forthwith and replaced by "academies"—state-funded independent schools that are overseen directly from Whitehall.

其中将给于学校革新伙伴来敦促他们加注游戏，一些被表现良好的邻校所接管的学校，还有一些立即被关闭的学校与被"学院"——由英国政府直接监管的公立独立学校所替代的学校。

Later, it makes some comparison with four kinds of modulation technique, and finally, it implements the three-level PWM switching power amplifier with the PWM technique. The power of the amplifier is 2kVA, and the frequency bandwidth is 10～3kHz. In the thesis, the author designs and makes the hardwares of the switching power amplifier. The hardwares contain power inverter rank circuit, control system circuit based on DSP, drive and isolation circuit, and protective circuit. The thesis also analyses the potential safety problems and put forward some solutions for the problems. Furthermore, the thesis accomplishes the software design of the control system, and successfully debugs it. The methods of designing higher power ampilfier are also discussed in the thesis. It analyses the feasibility of the methods, outlines the way of how to design higher power switching power amplifier, and does some experiments with the method of switches-parallelling.

根据电动振动试验系统对开关功放的要求，提出了以电感电流瞬时值控制技术为基础的三电平脉宽调制开关功放的设计方案，并通过系统仿真进行了原理性论证；然后设计并制作了开关功放的硬件，包括功率转换电路，基于DSP的控制电路，驱动、隔离电路以及保护电路；针对开关功放数学模型不易得出的特点，细致分析了模糊自适应PID控制方法，在此基础上编写了控制程序；研制出一台功率为2kVA，通频带为10～3kHz的三电平脉宽调制开关功放；论文中还探讨了实现大功率开关功放的方法，分析了各种方法的可行性，给出了实现大功率开关功放的思路，并进行了并联开关管实现大功率开关功放的实验。

Some people even do not believe that fact, this is not necessarily suitable for all people, and the effect of reaction is different, just like some people eat without Viagra Effects Some people eat it will clank clank sound.

有人竟然不相信，其实这个不一定适合所有的人，而且反应的效果也是不同的，就像伟哥有的人吃了没效果有的人吃了就会铛铛响。

This article detailedly expatiated upon the principles, contents and methods of cropland classification; it analyzed the necessity to combine the work of cropland classification with GIS technology, summarized the attributions of ARC/INFOand some other related softwares; it established the technologic route of cropland classification supported by GIS, by a case study in Liwu Town,Li County Hebei Province, this article expatiated the practicable mechanism of combining the function of ARC/INFO with the work of cropland classification, and put forward some new ideas and approaches of utilizing GIS: this paper put forward the idea of coding the polygons in the basic graphic database such as soil map and land use map according to their attributes, and put forward the detailed coding project; based on the code databases, it expatiated upon the detailed approaches to create single梖actor map and output the final classification map; it put forward the principles and the method of creating classification units in the environment of GIS, that is how to keep the lines of soil polygon, the border of districts and the important objects such as residential areas, banks of rivers and roads ,and how to overlap single梖actor soil map and land use map, and to delete some vector lines of the overlapped map appropriately; it detailed the methods of creating mathematic model of classification coefficients in the environment of computer, and used FOXPRO6.0 programs to realize the automation of calculating coefficients; it represented the method of plotting the final map by overlapping various coverages according to the code tables and lookup tables, the process of outputting the cropland classifying map was finished by program.

本文法对耕地等别划分的原则、内容及方法作了较详细的阐述，介绍了多系数综合修正法的耕地等别计算方法及其具体应用和AHP的确权方法；分析了耕地等别划分工作与地理信息系统技术相结合的必要性，简要介绍了地理信息系统软件ARC／INFO及其他相关软件的功能特点，制定了地理信息系统支持下耕地等别划分的技术路线，通过对河北省蠡县蠡吾镇的实证研究，重点阐述了ARC／INFO及相关数据库软件与耕地等别划分结合的有效机制及GIS应用的一些新思想、新方法：提山了对土壤图和土地利用现状图等基础图形数据库进行特征编码的思想和具体的编码方案，阐述了基于与图形库相链接的特征编码表，单因素图提取、成果图的输出的具体实现方法；提出了GIS环境下耕地单元划分的原则和方法，即在保留土壤因素图斑界线、行政界线和重要地物等的原则下，将土壤单因素图和土地利用现状图进行拓扑叠加，对叠加图中的矢量线进行适当的删除；阐述了在计算机环境下，耕地分等参数计算模型建立的方法，并用FOXPRO6.0语言程序实现了参数计算的自动化；阐述了根据图形库特征编码表和建立绘图符号查找表，按不同图层叠加绘制成果图的方法，该过程用命令程序实现耕地等别图的输出。

Soyka's suggestion indicates one good reason why some of the acts described in Dekkers book are clearly wrong, and should remain crimes. Some men use hens as a sexual object, inserting their penis into the cloaca, an all-purpose channel for wastes and for the passage of the egg. This is usually fatal to the hen, and in some cases she will be deliberately decapitated just before ejaculation in order to intensify the convulsions of its sphincter.

照这个说法来看，Dekkers书中提到的某些性行为显然有问题，而且应该被当成罪行：例如书中提到有些男人用母鸡作为性对象，把自己的阴茎插入母鸡排泄和下蛋的多功能出口，而这种动作往往会使母鸡致命；有些人甚至有意在自己射精的那一刻斩掉母鸡的头，好体验它的括约肌突然收缩。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。