结构上的

Among the open-chain crown ethers and cryptands with a same structure, the compounds disubstituted at the amide nitrogen atoms show the larger extractability for Am and Eu than the monosubstituted ones. The compounds disubstituted at the amide nitrogen atoms by two phenyl groups show the larger extractability for Am and Eu than those by two alkyl groups.

3在结构相同的开链冠醚和开链穴醚中，酰胺氮原子上二取代化合物对Am和Eu的萃取能力大于一取代化合物；酰胺氮原子上两个取代基都是苯基的化合物对Am和Eu的萃取能力大于两个取代基都是烷基的化合物。

In COBOL, a group data name that is used to refer to a nonunique data name at a lower level in the same hierarchy, or a section name at a lower level in the same hierarchy, or a section name that is used to refer to a nonunique paragraph.

COBOL语言中的一组数据名，用于表示同一层次结构中的较低层上的一个非唯一数据名或同一层次中较低层上的一个节名，或用于表示非唯一段的节名。

The structure analysis indicates that the reverse symmetry ligand H4LB molecules are linked into a 2D supermolecular network by two types of hydrogen bonds. One type occurs between the oxalamide oxygen group and the phenol hydroxyl qroup of the nearest molecule with d=2.906(2) and ∠O-H…O=151.8°. The other type is between the oxalamide nitrogen group and the oxalamide oxygen group of anther molecule with d=2.849(2),∠N-H…O=158.7°.

晶体结构研究表明配体H4L为顺式桥联分子，晶体中存在两种氢键，一种是草酰胺基团的O原子与苯环上的酚羟基形成O-H…O氢键[d=2.906(2)，∠O-H…O=151.8°]；另一种是草酰胺基团的氨基与相邻草酰胺基上的O原子形成N-H…O氢键[d=2.849(2)，∠N-H…O=158.7°]，通过上述两种氢键将化合物H4LB连接成二维网络结构。

The forming of lithologic reservoirs in the Palaeogene of Boxing Sag is generally characterized by multiple hydrocarbon expulsion,expulsion and accumulation coupling,and fourfold genesis controlling reservoir-forming.

博兴洼陷下第三系岩性油藏的形成具有&复式排烃、排聚耦合和四元控藏&的总体特征，而其独特的烃源岩结构和地层压力系统决定了沙四上亚段和沙三段烃源岩在排烃方式、排烃机制以及岩性油藏成藏特点上的不同。

Objective: To provide anatomic data for treating tumors in the posterior and middle tentorial incisural space through comparing anatomic features of the median and paramedian infratentorial-supracerebellar approaches. Methods: 10 formalin-fixed cadaveric specimens were dissected in steps by using the standard median and paramedian infratentorial-supracerebellar approaches under operating microscope respectively.

目的：通过正中和旁正中幕下小脑上入路的解剖学比较研究，为手术治疗小脑幕中和后切迹间隙的肿瘤提供解剖学基础方法：取10例福尔马林固定的尸头标本在手术显微镜下分别模拟正中和旁正中幕下小脑上入路进行逐步解剖，观察和比较不同手术入路所暴露的视野范围，描述重要解剖结构之间的关系。

The study of leaf epidermis at the specific level on Chinese Pennisetum.

文章题目叶表皮细胞结构在国产狼尾草属分种水平上的应用。

Prefectural region economy and urban economy have apparent difference on the structure.

县域经济和城市经济在结构上具有明显的差异。

For 9 pyrazole compounds,their geometry and electronic structures were analyzed by means of natural bond orbital theory;their reactivity was analyzed by electrostatic potential distributions,heats of formation and Bader density were also calculated.

在最稳定几何构型基础上，基于自然键轨道理论，分析了稳定结构的成键情况和吡唑环上的共轭性；用静电势图分析了吡唑化合物的反应性；理论估算了9种化合物的标准气态生成热和Bader密度；最后采用VLW方程计算了这些化合物的爆速、爆压。

For 9 pyrazole compounds, their geometry and electronic structures were analyzed by means of natural bond orbital theory; their reactivity was analyzed by electrostatic potential distributions, heats of formation and Bader density were also calculated. After that, detonation velocities and Chapman-Jouguet pressures of these compounds were given by means of VLW equation.

在最稳定几何构型基础上，基于自然键轨道理论，分析了稳定结构的成键情况和吡唑环上的共轭性；用静电势图分析了吡唑化合物的反应性；理论估算了9种化合物的标准气态生成热和Bader密度；最后采用VLW方程计算了这些化合物的爆速、爆压。

This is because thin nasal skin has a high capacity to contract and redrape over the sculpted framework.

这是因为在改造过的支架结构上薄皮肤更容易收缩和重新下垂。

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。