衰退期的

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。

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 US, he added gloomily,"will have its version of Japan's lost decade".

他沮丧地补充道，美国"将会迎来日本十年衰退期的美国版。"

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。

All the same, the nonpartisan National Bureau of Economic Research will almost certainly conclude in 2009 that a recession has occurred.

尽管如此，无党派的国家经济研究局几乎肯定会在2009年宣布衰退期的到来。

Business and consumer confidence data have weakened to near recessionary levels.

商业和消费者信心数据走低，接近经济衰退期的水平。

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。

There remained the generic conditions imposed by natural, as distinct from human law, as integral parts of the human whole: the necessity of destruction to procure alimentary sustenance: the painful character of the ultimate functions of separate existence, the agonies of birth and death: the monotonous menstruation of simian and human females extending from the age of puberty to the menopause: inevitable accidents at sea, in mines and factories: certain very painful maladies and their resultant surgical operations, innate lunacy and congenital criminality, decimating epidemics: catastrophic cataclysms which make terror the basis of human mentality: seismic upheavals the epicentres of which are located in densely populated regions: the fact of vital growth, through convulsions of metamorphosis, from infancy through maturity to decay.

324截然不同于人为的法则，这里依然存在着按照自然的法则作为对维持整个人类的生存不可分割的部分加诸于人的生物学之基本条件。为了获得有营养的食品，就不得不进行破坏性的杀戮。孤立的个人生存中终极机能那充满了苦恼的性质。生与死的痛苦。类人猿和人类女性那单调的月经，自初潮期一直延续到闭经期。海洋上、矿山和工厂里那些不可避免的事故；某些非常痛苦的疾病以及伴随而来的外科手术；生来的疯颠，先天性犯罪癖；导致人口大批死亡的传染病；在人类心灵深处种下恐怖种子的灾难性特大洪水；震中位于人口密集地区的大地震；历经剧烈变形，自幼年经过成熟期进入衰退期的生命成长的事实。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。