查询词典 quadrangular

The calculated results show: the ground state structures of PtNi5, Pt2Ni4 and Pt3Ni3 clusters are quadrangular bi-pyramid, and Pt4Ni2 and Pt5Ni clusters are triangular bi-pyramid with hat and triangular pyramid with quadrilateral, respectively. From the point of view of thermodynamics, PtnNim clusters are stable because of the negative enthalpy of formation; the positive NICS of PtNi5 clusters show anti-aromaticity, The negative NICS of Pt2Ni4 and Pt5Ni clusters show aromaticity. The number of the IR absorption peak of Pt3Ni3 is the most. The IR and raman absorption peak of PtNi5 , IR of Pt2Ni4, Raman of Pt3Ni3 and Pt4Ni2 have only one. The absorption peak of Pt5Ni appears in the bigger frequencies only, and is zero almost in the small frequencies.

研究结果表明：PtNi5、、Pt2Ni4、Pt3Ni3团簇的基态结构都为四角双锥结构，Pt4Ni2 和Pt5Ni团簇的基态结构分别是戴帽三角双锥和三角锥戴四边形结构；PtnNim团簇的生成焓都为负值，表明团簇在热力学上是稳定的；由NICS值可得，PtNi5团簇具有反芳香性，Pt2Ni4和Pt5Ni团簇具有芳香性；从光谱分析来看，Pt3Ni3团簇的IR较强吸收峰的个数最多，PtNi5团簇的IR和Raman、Pt2Ni4团簇的IR、Pt3Ni3和Pt4Ni2团簇的Raman只有一个强吸收峰值，Pt5Ni团簇的峰值只出现在频率较大的位置，频率小的位置几乎为零。

Stems quadrangular, lightly grooved to nearly winged, glabrous or white crisped hairy.

四棱的茎，轻而易举具凹槽对近具翅，或白色使卷曲有毛。

Inflorescences racemose or spiciform, continuous and dense or less often interrupted and rather lax; corolla tube mostly broadly cylindrical and at least 2 mm wide; branchlets quadrangular and often 4-winged

间断的穗状花序状，连续和紧密的花序总状的或或更少通常和相当疏松；宽多数的花冠筒圆筒状和至少2毫米宽；小枝四角形和经常4有翼 16 Buddleja macrostachya 大序醉鱼草

Branchlets quadrangular to subquadrangular, 1(--2) mm in diam. when dry; leaf margin coarsely sinuate-dentate or entire; calyx and corolla outside pubescent with glandular hairs which may be accompanied by some stellate hairs

干燥时的对近四棱，1(-2)毫米直径四角形的小枝；粗的叶缘具深波状的具牙齿的或全缘；可能是伴随着一些星状毛的花萼和花冠外面被短柔毛具腺毛 6 Buddleja lindleyana 醉鱼草

Finite-element analysis of quadrangular drill tower under wind load ;2. Curvature variation rule of cable and membrane structures subject to the wind load ;3. Then the wire strands and catway of Zhoushan Xihoumen bridge applied wind load in main cable construction are studied.

探讨了西堠门大桥主缆架设期间不同工况中索股在各级风载下的横向变形规律，结合猫道在不同级风载作用下的横向变形，通过索股和猫道相对横向变形量确定出猫道上可供主缆架设施工的风速。

Cross plane truss system.2.net rack system consists of quadrangular awls.3.net rack system consists of triangular awls.

平板网架按组成的单元不同可以分为三种体系：①交叉平面桁架，②由四角锥组成的网架系，③由三角锥组成的网架系。

Finally, far away to the east, Vincennes, and its seven quadrangular towers to the south, Bic阾re and its pointed turrets

最后，远处东边是樊尚林苑及其七座四角塔楼；南边是比塞特及其尖顶小塔；注意，注意力集中

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷