成对的

To optimize the reaction condition for the purpose of target compounds synthesis, the advance of 1,3-dipolar cycloaddition and click chemistry is reviewed. The conditions of the reaction between azides or nitrile oxides and terminal alkynes were optimized experimentally and the best operation condition was established.

论文综述了偶极环加成反应和点击化学的进展，特别对Cu催化的腈氧化物或叠氮化物与端炔化合物之间的1，3-偶极环加成反应进行了理论分析与实验研究对反应条件进行了优化，确立了实验室中进行反应的最佳操作条件。

On the basis of the topological structure of FBB and their polymerization in borates(isolate, chain, layer and framework), a new systematic borate-classification is put forward,and all available borates are classified.

依据FBB自身的拓扑结构不同和在晶体结构中的排布方式不同(孤立、成链、成层、成三维网架)对所有可用的硼酸盐进行了系统的分类。

Methods: Fibroblast cell were treated with -300,-500 and -1 000V PTFE electrets for 24, 48 and 72 h, respectively, and the influence of negative electrets on cell apoptosis was studied by means of flow cytometry and transmission electron microscope.

选用-300、-500和-1 000 V PTFE驻极体作用于成纤维细胞24、48和72 h，利用流式细胞仪和透射电子显微镜研究负极性驻极体对成纤维细胞凋亡的影响。

Son of man, the house of Israel is become dress to me: all these are brass, and tin, and iron, and lead, in the midst of the furnace: they are become the dress of silver.

「人子，以色列家族对我好像是渣滓，他们成了炉中的铜、锡、铁和铝，他们都成了银渣。

Objective To investigate the biological characteristics of superparamagnetic iron oxideslabeled myoblasts in vitro.

目的 研究超顺磁性氧化铁纳米粒子标记成肌细胞方法及其对成肌细胞活性的影响。

Objective : To study the diagnostic value of MRI and MR venography in cerebral venous sinus thrombosis.

目的：探讨常规磁共振成像及磁共振静脉成像对脑静脉窦血栓形成的诊断价值。

The tracking system of infrared imaging guiding is used as research objet in this paper,also is CCD.And the principle of infrared imaging guiding is generalized.Three jamming modes with laser are introduced.

本文以红外成像制导武器跟踪系统及其核心部件硅CCD为研究对象，对制导原理进行了概括，提出了激光干扰红外成像制导系统的3种途径。

On the contrary, the teeth profile of elliptical gear should be generated when spur gear is replaced by pinion cutter and the elliptical gear is replaced by elliptical blank.

按反求设计的观点，将椭圆齿轮换成椭圆齿坯，将直齿圆柱齿轮换成插齿刀，则可以对椭圆齿轮进行插齿加工。

Put two adjacent fabrics(single-fibre cloth), each measuring 5 cm ×4 cm , side by side on a specimen measuring 10 cm × 4 cm, next, either sew roughly four sides of the specimen with white cotton sewing thread, or fold in half the specimen into 5 cm ×4 cm size so as to lay the adjacent fabric inside, and sew roughly at its near centr of the specimen with white cotton sewing thread to make the sewing line parallel to the folding line.

把两个各自5厘米× 4厘米毗连的织布，并排放置成10厘米× 4厘米的试样，然后用白棉缝纫线粗略地在试样四周进行缝制，或把试样对折成5厘米× 4厘米大小以确保毗连的织物放在里面，然后用白棉缝纫线以平行于对折线的方向在试样近中心处进行粗略缝制。

The microsturcture characteristics of M2 cast-strip were studied with such experimental methods as metallographic analysis, SEM, XRD and TEM[0]. The effect of sub-rapid solidification on the size, type and distribution of eutectic carbides in M2 cast-strip was analyzed. The effect of heat treatment temperature and its holding time on the eutectic carbides in M2 cast-strip was explored. The eveolution of metastable phase of M2C eutectic carbide during the heat treatment period and the decomposition dynamics concerned were researched. The M2 cast-strips were rolled into thin strips and the effect of deformation ratio on carbides in M2 cast-strip was examined. Then these thin strips were comparied with those that were produced by conventional technology on carbide, hardness, red-hardness and bend strength. At last the rolled M2 cast-strips were made into saw blades and their cutting performance was experimented on in tools factories and then compared with that of similar products produced by conventional technology.

采用常规金相、扫描电镜、X射线衍射及透射电镜等实验研究了M2高速钢铸带的凝固组织特征，分析了亚快速凝固对铸带中的共晶碳化物的析出类型和尺寸以及分布的影响；探索了后续热处理温度和保温时间对铸带碳化物组织的影响规律，分析了铸带中的亚稳相M2C共晶碳化物在热处理过程中的分解情况以及分解动力学；将铸带热轧成薄带，研究了压下率对铸带碳化物组织的影响，并将热轧薄带与常规工艺生产的相同规格的M2高速钢薄带在碳化物组织、硬度与红硬性以及抗弯性能等方面进行了对比；将热轧薄带加工成机用锯条后在工具厂进行了锯切性能试验，并与常规工艺生产的同类产品进行了使用性能对比。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。