三分的

ABSTRACT This thesis is aimming at the synthetic study of Cephalotaxine, and consists of the following three parts: Charpter 1 reviews the isolation, chemical structure identification, biological activities, and synthetic studies of structurally unique antileukemia Cephalotaxus alkaloids.

本论文以三尖杉碱的全合成新方法为研究的核心，共分以下三部分内容：第一章简要地概述了天然三尖杉生物碱的分离、结构及生理活性，三尖杉碱的全合成研究。

The different climbing plants have different branching behaviour. Humulus scandens increases the chance of encountering the external support through increasing the number of branches on unit stem length, but Ampelopsis delavayana and Parthenocissus tricuspidata increase the chance of encountering the external support through increasing branch length.

不同攀援方式植株以及植物的不同生长形式均表现出了有差异的分枝行为，葎草通过增加单位茎长度的上分枝数以达到增加遇到外界支持物的机会，而三裂叶蛇葡萄和爬山虎则通过增加分枝长度的方法来增加遇到外界支持物的机会。

Methods On the basis of the three-dimensional computed tomography, 75 cases of complex acetabular fractures were diagnosed and classified according to Letournel classification. They were treated through the anterior, posterior, combined anterior-posterior and the improved iliofemoral approaches. All the fractures were fixed with screws and AO reconstruction plates.

75例Letournel分型复杂髋臼骨折，术前经骨盆CT三维重建明确诊断分型后，分别采用前、后入路，前后联合入路及笔者改良的髂股入路显露并复位，AO重建钢板内固定。

Three major embryonic tissue systems,shoot apical meristem,root apical meristem,and the differentiation of procambial strands,were visible in torpedo-stage somatic embryo.

三种主要的胚性组织系统包括芽顶端分生组织，根顶端分生组织和原形成层束在鱼雷形胚阶段清晰可见。

Based on the observation about the ramets characters of predominant clonal rhizome plants from wetland, their modular structure, reproductive allocation and population dynamics were measured and results indicate that:(1) There are 2 or 3 age classes of ramets and 3 types of tubers of Scirpus planiculmis population in terms of four times observation in three years.

对湿地优势根茎植物种群分株构件的年龄结构、构件性状、生殖分配及种群数量动态观测结果表明：(1)紧穗三棱草种群分株3年4次观测有2～3个龄级，球状根茎可划分为3个类型。

The effects of three dispersants （PVP, Triammonium citrate,β-Alanine） on the stability of ITO suspension prepared by ball milling dispersion were studied. The influences of dispersing time and dispersant content on stability of ITO suspension were investigated.

选用3种分散剂（聚乙烯吡咯烷酮、柠檬酸三铵、β-丙氨酸），通过球磨分散法制各ITO浆料，通过考察球磨分散时间和分散剂量对ITO浆料稳定性能的影响，分析比较不同分散剂对浆料稳定性作用，并探究其分散机理。

The dispersion and stability of BaTiO〓 suspensions with tribasic ammonium citrate and ammonium salt of poly as dispersants were investigated respectively by means of sediment experiment and rheology measure, and the optimal dispersion conditions were obtained.

通过沉降实验和流变性测量，研究了分散剂柠檬酸三铵、聚甲基丙烯酸铵分别对BaTiO〓悬浮体的分散和稳定作用，确定了分散剂最佳使用条件。

The feedstock was changed from high purity meta- trimethylbenzene to meta- trimethylbenzene blended with 45%-55% mixed trimethylbenzene obtained from the top of the heavy component removal column; the original 3-column separation scheme was replaced by 2 columns; and modified the isomerization reaction system in compatible with the separation system for capacity enlarge.

金陵石化公司炼油厂针对异构化装置生产均三甲苯经济效益不明显的情况，改变了原料路线，在原以高纯度偏三甲苯为原料的基础上掺炼 4 5 %～ 5 5 %的脱重组分塔塔顶混合三甲苯；优化了均三甲苯分离流程，将原来的三塔流程改为两塔流程；进行了异构化反应系统与分离系统相匹配的扩容改造，收到了良好的效果，均三甲苯生产能力由 4 5 0t/a提高到 12 0 0t/a ，收率由 11%提高到 2 2 。0 %～ 2 4 。0 %，纯度由 97.9%提高到 98.9%。

Digestive tract reaction observation: record the digestive tract reaction during the 1-7 days after DDP application, involves the grade of nausea, disgorging and appetite.

消化道反应观察：在顺铂应用后1-7天记录消化道反应，包括恶心、呕吐及食欲分度，比较三组间消化道反应分度、持续时间以及平均呕吐次数的差异。

C* O5 ^6 j# _王建民加油站 Bobby Abreu had a two-run double and Jason Giambi hit a two-run homer in the third as New York's big boppers staked Chien-Ming Wang to a 5-0 lead.

V8 _6 e6 Y8 H% b 三局下阿伯击出1支2分打点2垒安打，技安也补上了1支2分打点全垒打使得小民领军的洋基队以5：0领先遥遥领先。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。