二中心的

Then an in-depth analysis and comparison between anticipated hard handover and two network interfaces soft handover are performed. Based on that, we propose two paths IP soft handover and its algorithm. The entire algorithm includes second capsulation algorithm of train part and decapsulation and data recovery algorithm of railway and control center part.

通过分析和比较预扫描硬切换和双网络接口软切换，本文提出了双路径IP软切换方案并设计了双路径IP软切换算法，整个算法包括车载部分的二次封装算法和轨旁及控制中心部分的解封装和数据还原算法。

The disadvantages that the secondary spectrum of reimaging catadioptric step zoom lens can not be corrected are overcome. Moreover, the black spots generated in image plane center are avoided and the structure is simple.

克服了二次成像折反射式步进变焦方式二级光谱不能校正的缺陷，并且杜绝了像面中心产生黑斑的可能，结构也比较简单。

According to the disc of the installation in the valve body, butterfly valve can be divided into the following forms:① centrosymmetric board.

阀杆固定在蝶板的径向中心孔上，阀杆与蝶板均垂直安装二、非密封形蝶阀：关闭时不能保证密封的蝶阀。

The ISCSCI NL was on an average, two-thirds of a vertebral level cephalad to the center of the lesion on MRI.

ISCSCI N平均三分之二的脊椎水平与磁共振所示的损害中心吻合。

Methods The yield of combinant human IL-18 expression in E.coli remains quite low because the sequence of mature hIL-18 has 37aa rare condons for E.coli in a total of 157aa.

它们的分子中没有N-糖基化位点，不存在二硫键，很可能巯基就是分子的活性中心。

First, with multi-centered concentralization and regular intersection of azonality and zonality, the villages are not uniformly distributed. Second, basically in agreement with the differences in rainfall, population distribution and regional economy, the number of cancer villages recedes from eastern part to western part in a graded pattern.

其地理分布有两个特点：一是空间分布不均匀，呈现多中心集中形态，体现出非地带性和地带性规律的交叉；二是癌症村数量由东向西递减呈梯度分布，与我国的水资源、人口分布和区域经济差异基本一致。

Plant Resources Center of the School of Biological Sciences of the University of Texas at Austin with over 1,100,000 specimens is the largest herbarium in the southwestern United States and ranks fifth among U.S. university herbaria and twelfth across the nation.

美国奥斯汀德克萨斯大学生物科学学院植物资源中心拥有超过1，100，000的标本，是美国西南部最大的植物标本馆，并在美国大学植物标本馆中名列第五，在整个美国名列第十二。

Result The optimal nutrients for production of PDG by Phoma sp.

在单因素实验的基础上，通过三元二次中心组合设计和响应面分析法优化杜仲茎点霉SP-16F发酵产生PDG的最佳营养条件。

Methods Based on the model of round axial symmetry turbulent jet, three simplified categories of the mitral regurgitant jet were proposed.

方法据圆形轴对称自由紊动射流模型，利用超声成像模拟软件FieldⅡ模拟简化的二尖瓣反流的三种情况：①完全正向射流；②中心为正向射流，边缘为负向反流；③上半部分为正向射流，下半部分为负向反流。

This happens in a so called reaction center inPhotosystemⅡ, where a tetrameric chlorophylls (P680) absorb the solar light andinitiate photoinduced electron transfer reaction to the acceptors, quinone A and B. Thephoto-oxidized P680 retrieves the electron from a Mn4Ca cluster via a tyrosine, thelatter components are also called oxygen evolving center. After 4 photo-processes, twomolecular water are oxidized to a molecular oxygen.

在光系统二的活性中心，叶绿素P_(680吸收太阳光，将电子传递给电子受体、醌A和醌B，同时光氧化的P_(680)~+从释氧中心中得回电子(通过Tyr_z氧化Mn4Ca簇)，经过四次光诱导电子转移，两分子水最终被氧化生成一分子氧气。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。