同心圆

In part two, the optical spatiotemporal pattern in ring optic cavity is investigated. Using delay feedback with spatial perturbation method, the system shows roll, square, hexagon, homocentric circle,"honeycomb"and"snowflower" pattern with different spatial perturbation functions. Different patterns can be coexist and compete each other with the same perturbation function, which is the new character of this optical system with delay feedback.

第二部分，利用延时反馈的空间微扰方法研究了环形腔中二能级介质的光学时空斑图的控制，在不同的微扰函数作用下，出现了滚筒状、四方形、六角形、蜂窝状、同心圆以及&雪花&状等不同的斑图，并且在相同的微扰函数下出现了不同斑图之间的竞争，这种竞争是我们发现的这一具有空间微扰的延时反馈非线性光学系统光学斑图的新特征。

Bright Qing Dynasty region composition centers industry and commerce of two acting Jinan relatively, with Ming Dewang government office (Qing Dynasty strokes a courtyard) for the center, organization of space of urban economy function presents the characteristic that gives homocentric cirque shape to distributing, apparent ground is known the effect of pattern by the diplomacy inside the city, area of industry and commerce is concentrated at artery two side are mixed city gate inside and outside, the free market of agricultural products distributings at suburbs, but environment of geography of ancient city suburbs and traffic situation have very big difference, suffer its to affect on the west outskirt economy is most active, boreal outskirt is the flattest.

明清两代济南工商业区布局相对集中，以明德王府为中心，城市经济职能空间组织呈现出同心圆环状分布的特点，并明显地受到城内外交通格局的影响，工商业区密集于干道两侧和城门内外，农贸市场分布于四郊，但是古城四郊地理环境和交通形势有很大差异，受其影响西郊经济最为活跃，北郊最萧条。

And the long axis of simple pit Varied along with CMfs orientation of each secondary wall.This paper proposed a structure model of Phyllostachys pubescens cell wall,based on the results of CMfs deposition and thickness of each secondary wall.Secondly, it was a multilamellate structure of parenchyma cell wall,but its thin and thick lamellate was not evident.CMfs orientation on primary wall of parenchyma cell was perpendicular to cell axis.

纤维的细胞壁为典型的薄厚层相间的同心圆多层结构，初生壁CMfs排列方向与细胞轴向垂直90°次生壁中厚层的CMfs均以接近平行的小角度(0～5°沉积；薄层一般以大角度沉积，且薄层的CMfs角度由壁外侧向细胞腔里逐渐增加，直到完全垂直。

At eccentricities of 20 degree, VEP yielded the largest responses to gratings perpendicular to the visual field meridians through stimulus locus and the lowest responses to meridionally oriented gratings.

在距中央凹20°视角同心圆的八个刺激位置上，VEP反应幅度对与向心线垂直方位的光栅刺激，有统计意义上的优势。

The results indicated that there was an ecological succession of wetland plant communities and that the successive series is as follows: aquatic plant→helophytes→swampy prata→herbosa with the changes of habitat from aquatic to mesophytic. The horizonal distribution regularity of plant communities showed symmetric distribution at loop lake or banks of small stream and con centric distribution at depression. The vertical distribution regularity is as follows: aquatic vegetation→moor vegetation→swampy prata vegetation→subalpine meadow subalpine shrub from the center of lake to the hilltop.

结果表明，随着湿地水分由多到少的变化，植物群落类型发生相应的生态演替，其演替序列为水生植被→沼生植被→沼泽化草甸植被→草甸植被，且在水平方向呈对列式和同心圆式分布；从湖心至丘顶的垂直分布规律表现为水生植被→沼泽植被→沼泽化草甸→亚高山草甸→亚高山灌丛。

He impedance change of pulmonary circulation was detected With the esophageal electrodes put in the esophagus below the left atrium of rabbits and the surface electrodes of the thorax in the fifth intercostal space at the right midaxillary line.

将食道电极置于家兔食道下段左房水平以下，将体表同心圆电极置于右腋中线第五肋A间，用食道电极结合体表电极检测肺部血管阻抗变化，此法简称经食道肺血流图。

The world is a monotypic circle in different modes.

世界是个同心圆。

Male and female use mouth and tail to clear away dense vegetation to make donut-shaped floating nest about 11.8 in (30 cm) in diameter, into which the translucent yellow nonadhesive eggs (about 0.06 in/0.15 cm in diameter) are placed.

男、 女使用口和尾清除要同心圆形状浮嵌套约 11.8 中（30 厘米）的密集植被直径，透明黄色 nonadhesive 蛋（约直径的 0.06 0.15 ／厘米）放到其中。

The key of preventing redislocation was:analyzing pathological change of hip dislocation in every patient correctly,selecting true operation type,intercepting bone rotatively below femur trochanter,diminishing angulus acetabularis and keeping relationship of cocenric circle between femoral head and acetabulum.

正确分析每一例患儿引起髋关节脱位的病理变化，选择正确的术式，行股骨粗隆下旋转截骨，减小髋臼角，使股骨头与髋臼保持同心圆关系，是预防再脱位的关键。

Methods Eight cases of cerebral sparganosis treated at Huashan Hospital between 1982 and 1997 were analyzed retrospectively.

结果本病的病理特点为：1蚴虫虫体为实体，无体腔，具特征性体壁；2蚴虫虫体内散在分布的同心圆性圆形或椭圆形的石灰小体及单个肌纤维；3脑内有新旧不一的多发性小脓肿。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。