衰退期

The ultrastructural changes during the development of sieve element companion cell complex (SE/CC complex) in Populus deltoides were investigated using electronic microscopy. The result showed that SE and CC tome from the same secondary phloem mother cell. The development of sieve element went through three stages, i. e. immature, mature, and degenerate stage. In immature stages the sieve element presented radial expansion, cell wall thickening, and production of sieve plastid and P-protein. The cytoplasma selectivly autolysed in mature stage. At the same time, karyoplasm was dispersed, and nuclear envelope was not clear, or karyoplasm was disorgnized, and nuclear envelope was clear. The karyopalsm finally turned into P-protein. In degenerate stage, the cytoplasm completely disappeared, and the function was lost.

利用电镜技术研究美洲黑杨次生韧皮部筛管和伴胞发育过程中细胞超微结构的动态变化，观察到筛管和伴胞由同一个次生韧皮部衍生细胞分裂分化形成筛管约发育历经未成熟期、成熟期和衰退期的变化未成熟期筛管分子表现为细胞的径向扩展、壁的增厚、筛管质体和P-蛋白质的产生；成熟期筛管分子细胞组分发生选择性自溶，细胞核核质弥散状，核膜不清晰，或核膜清晰而核物质降解，最后细胞核完全解体转化为P-蛋白质类的物质；衰退期筛管分子细胞质完全解体消失，失去功能。

At last, we continue to analyze the influence which the macroeconomic growth rate has on the volatility of the stock returns. We make the macroeconomic growth rate as an exogenous variable to add to the above iterated weighted volatility model. From the above analysis, we can draw a conclusion that the volatility of the stock returns of Chinese stock markets will strengthen in economic expansion period and weaken in economic recession period.

在此分析前提下，继续深入分析宏观经济增长率对股票市场收益率波动的影响，将宏观经济增长率作为外生杠杆变量加入到上面的迭代加权最小二乘法的条件波动率模型中，结论是我国股票市场收益在经济扩张期波动性减弱，而在衰退期波动性增强。

Based on the brand life cycle theory and the complexity of the market,this article proposes that a medicine brand life cycle consists of five phases,i.e.,the precursor,appearance,cognizance,famousness and decline.It also analyses the feature of each phase and the relevant marketing strategy f...

文章从品牌生命周期理论出发，结合药品市场的复杂性，提出了药品品牌生命周期，将其分为前导期、产生期、知晓期、知名期、衰退期五个阶段，分析了各个阶段特点，并针对每个阶段提出了相应的药品营销策略。

The calculation was on the basis of Excel and Statistica software. The results show that in East China Sea region the 10 main fisheries development have 4 periods: undeveloped, on developing, mature and senescent. It also shows that most of the 10 fisheries are in the periods of senescent, such as hairtail, large yellow croaker, filef...

结果表明：东海区主要种类渔业发展过程符合渔业发展的一般规律，即经历未开发、开发中、成熟和衰退 4个阶段，且主要种类如带鱼、大黄鱼、小黄鱼、马面等渔业大多处于成熟期或衰退期，从而预测其发展趋势，并提出必须加强渔业管理、控制捕捞强度等使渔业实现可持续发展的管理措施。

The monotone industrial structure, economic decreasing, lots of lay off ,destroying of environment, and so on.

其中许多城市随着资源开采进入衰退期或枯竭期而成为资源枯竭型城市，面临着产业结构和所有制结构单一、经济增长缓慢、失业率增加、生态环境破坏严重等问题，城市产业转型势在必行，转型中困难较多，充足的资金是一个必要的前提条件，而大力吸引并有效合理利用外资无疑是一种必然选择。

Results showed that the alga increased the boimass in growing period and withered quickly in recession period with the increase in terramycin concentrations within 0-5 mg/L; and terramycin improved the contents of pigments more or less.

结果表明：在0—5mg／h范围内，土霉素的浓度越大，细胞数量在增长期内增幅越大。在衰退期内衰退越快；土霉素对色素含量有不同程度的促进作用。氯霉素浓度〉1mg/L时。

With much of the world in recession, the banking industry has been girding itself for some time against the threat in recessions banks expect to make losses on loans.

随着世界大部分地区进入衰退期，为应对危机，银行业惜贷已经有一段时间了--在衰退期，银行的贷款业务会遭到损失。

Effects of reaction time on SBET , pore volume, average pore diameter and coke over Co - ZSM - 5 zeolite under aldehyde - ammonia condensation were discussed.

本文在研究反应时间对醛氨缩合催化剂Co-ZSM-5分子筛比表面积、孔体积、平均孔径及积炭量的影响中发现，Co-ZSM-5分子筛催化剂的失活过程经历四个阶段：高水平活性稳定期、活性衰退期、低水平活性稳定期和二次活性衰退期四个阶段。

The peak meets the palm door person of business of number of WPP of tycoon of sale of the honored guest of give a lecture that Beijing stands, whole world the approval that the intention with current to Internet Mark Read also indicated height: Market sale personnel is met by the network the measurable sex of sale, fast answer gender and sharper market to popularize speed place to attract, and these elements are in economic depression period meeting appears more valuable -- these advantages may be transferred to network advertising quickly, make network media is in a more significant position in walking out of economic depression.

峰会北京站的主讲嘉宾、全球营销巨头WPP数字业务的掌门人Mark Read对互联网当前的作用也表示了高度的赞同：&市场营销人员会被网络营销的可测量性、快速响应性和更快的市场推广速度所吸引，并且这些因素在经济衰退期会显得更有价值——这些优势可能会加速向网络广告的转移，使得网络媒体在走出经济衰退中处于一个更重要的位置。&

The recession of the world's glaciers is considered a strong indicator of climate change and glaciologists in France have been watching in alarm as their glaciers recede.

世界冰河衰退期，是气候改变的强烈指标，法国冰河学家一直在观察，他们国家冰河衰退的警讯。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。