三次

This conclusion corrects a mistaken resultIn the planar quadratic system there is not cubic algebraical saddle-nodeseparatrix-loop,in which the author asserrts that quadratic system has no the cubicalgebraical saddle-node separatrix cycle .

本文证明了平面二次系统的三次代数同宿轨线上可以存在鞍结点，并且二次系统可以存在含鞍结点的无返回映射三次曲线分界线环。

Results: The optimized extract's technological parameters were: refluxed three times by 75% ethanol, five times ethanol at first, then four times and four times separately as solvent added, for one hour at each reflux.

结果：优化的最佳提取工艺为取牡丹皮等药味，用75%乙醇加热回流三次，第一次加75%乙醇5倍量、第二次加4倍量、第三次加4倍量，每次回流1小时。

Feudal society replaced slavery society, capitalism supplanted feudalism, and, after a long time, socialism will necessarily supercede capitalism.

（一个世纪以来，中国人民在前进道路上经历了三次历史性的巨大变化……）第一次是辛亥革命，……第二次是中华人民共和国的成立，……第三次是改革开放

When he asked why,she answered,"Last night when it cuckooed midnight,it cuckooed three times,said "crap,cuckooed one more time ,farted,cuckooed three times ,cleared its throat,cuckooed two more times and then started giggling.

他问为什么，妻子说，昨天午夜咕咕钟叫的时候，它先咕咕了三次，说&废物&，又咕咕了一次，farted，再咕咕了三次，然后清了请嗓子，咕咕了两次，最后咯咯地傻笑起来。

When he asked why, she answered,"Last night when it cuckooed midnight, it cuckooed three times, said 'Crap!,' cuckooed one more times, farted, cuckooed three times, cleared its throat, cuckooed two more times and then started giggling."

当这个人问为什么的时候，他的妻子回答说：昨天夜里当它咕咕十二点的时候，它咕咕了三次，说：&废物&再叫了一次，farted，然后又叫了三次，清了清嗓子，又叫了两次之后开始格格笑。

When he asked why, she answered,"Last night when it cuckooed midnight, it cuckooed three times, said 'Crap!,' cuckooed one more times, farted, cuckooed three times, cleared its throat, cuckooed two more times and then started giggling."

当他问这是问什么时，妻子回答道：&昨天午夜咕咕钟叫的时候，它先咕咕了三次，说&废物&，又咕咕了一次，放了个屁，再咕咕了三次，然后清了请嗓子，咕咕了两次，最后咯咯地傻笑起来。&

So Jelling said: The Roman Empire conquered the world three times, first by force, and the second to religion, the third law.

所以耶林说：罗马帝国曾三次征服世界，第一次以武力，第二次以宗教，第三次以法律。

Based on aforementioned findings, the author disclosed China have gone through three wave of marketing since the open policy reform in the end of seventies in the last century: the first wave taken place from the end of seventies to the end of eighties of last century, during this period of time, enterprises commonly took a marketing tactics mix of unitary product, high gross-profit pricing, wholesale and information notification; the second wave happened from the end of eighties to the end of nineties in the last century, during the second wave, enterprises often took a marketing tactics mix of serialized products, medium gross profit pricing, regional distribution and advertisement on mass media; the third wave occurred from the end of nineties of last century to now, during the third wave, enterprises usually adopted a marketing tactics mix of segmented products, low gross profit pricing, outlet interception and tangible benefits promotion.

基于上述认识，本书进而揭示出，中国市场自上个世纪70年代末改革开放以来，已经经历了三次营销浪潮：第一次营销浪潮发生在20世纪70年代末至80年代末，期间，企业界普遍采取的是&单一化产品+高毛利政策+批发销售+信息告知&的链接标记营销策略组合。第二次营销浪潮发生在20世纪80年代末至90年代末，期间，企业界普遍采取的是&系列化产品+中毛利政策+区域链接标记分销+大众链接标记广告&的营销策略组合。第三次营销浪潮发生在20世纪90年代末至今，期间，企业界普遍采取的是&细分化产品+低毛利政策+链接标记终端拦截+实惠促销&的营销策略组合。

Based on aforementioned findings, the author disclosed China have gone through three wave of marketing since the open policy reform in the end of seventies in the last century: the fi rst wave taken place from the end of seventies to the end of eighties of last century, during this period of time, enterprises commonly took a marketing tactics mix of unitary product, high gross-profit pricing, wholesale and information notification; the second wave happened from the end of eighties to the end of nineties in the last century, during the second wave, enterprises often took a marketing tactics mix of serialized products, medium gross profit pricing, regional distribution and advertisement on mass media; the third wave occurred from the end of nineties of last century to now, during the third wave, enterprises usually adopted a marketing tactics mix of segmented products, low gross profit pricing, outlet interception and tangible benefits promotion.

基于上述认识，本书进而揭示出，中国市场自上个世纪70年代末改革开放以来，已经经历了三次营销浪潮：第一次营销浪潮发生在20世纪70年代末至80年代末，期间，企业界普遍采取的是&单一化产品+高毛利政策+批发销售+信息告知&的营销策略组合。第二次营销浪潮发生在20世纪80年代末至90年代末，期间，企业界普遍采取的是&系列化产品+中毛利政策+区域分销+大众广告&的营销策略组合。第三次营销浪潮发生在20世纪90年代末至今，期间，企业界普遍采取的是&细分化产品+低毛利政策+终端拦截+实惠促销&的营销策略组合。

Based on aforementioned findings, the author disclosed China have gone through three wave of marketing since the open policy reform in the end of seventies in the last century: the first wave taken place from the end of seventies to the end of eighties of last century, during this period of time, enterprises commonly took a marketing tactics mix of unitary product, high gross-profit pricing, wholesale and information notification; the second wave happened from the end of eighties to the end of nineties in the last century, during the second wave, enterprises often took a marketing tactics mix of serialized products, medium gross profit pricing, regional distribution and advertisement on mass media; the third wave occurred from the end of nineties of last century to now, during the third wave, enterprises usually adopted a marketing tactics mix of segmented products, low gross profit pricing, outlet interception and tangible benefits promotion.

基于上述认识，本书进而揭示出，中国市场自上个世纪70年代末改革开放以来，已经经历了三次营销浪潮：第一次营销浪潮发生在20世纪70年代末至80年代末，期间，企业界普遍采取的是&单一化产品+高毛利政策+批发销售+信息告知&的营销策略组合。第二次营销浪潮发生在20世纪80年代末至90年代末，期间，企业界普遍采取的是&系列化产品+中毛利政策+区域分销+大众广告&的营销策略组合。第三次营销浪潮发生在20世纪90年代末至今，期间，企业界普遍采取的是&细分化产品+低毛利政策+终端拦截+实惠促销&的营销策略组合。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。