圆心

Then thetheorem can be proved by calculating the distances of centres between a nine-point circle and...

然后通过计算九点圆与内切圆、九点圆与旁切圆的圆心距，使定理获得证明。

As the contour of a wheel rim is easier to detect than the contour of a wheel, and the contour of a wheel rim and the contour of a wheel are approximately concentric circles on the same plane, we first detect the contour of the wheel rim, the center of the wheel rim and the contacting point between the wheel and the ground, then we detect the contour of the wheel via the invariance of cross ratio under projective transformation.

由于提取钢圈轮廓比提取车轮橡胶轮廓容易，而且钢圈轮廓和车轮轮廓可以近似看作同一平面上的两个同心圆，所以在本文中，我们首先提取钢圈轮廓、钢圈圆心和车轮与地面接触点在图像上的投影，然后利用射影变换保持交比不变的性质求出车轮轮廓。

All legal checks must be directed away from a seven-inch sphere or ""bubble"" around the head of the player.

正当的击杆动作要在以球员头部为圆心，七英尺为半径的圆外尽心。

Canada's Tessa Virtue and Scott Moir have taken over the lead heading into the final portion of the Olympic ice-dance competition in Vancouver, scoring a personal best of 68.41 points in Sunday's original dance.

第四局比赛，再次拿到后手的中国队发挥稳健，王冰玉在最后一投放弃了冒险的打双飞战术，稳稳的将壶旋进圆心后，再拿1分后继续以4-1保持领先。

Erected in the center circle with a vertical bar disk.

在圆周的圆心竖一根与盘面垂直的直杆。

After we perform the measurement, obtaining some result x, the wavefunction collapses into a position eigenstate centered at x.

在我们完成测量后，获得某些结果x，波函数坍塌为以x为圆心的位置特征态。

During the past decade and more, under the guidance of state strategy US forces made all-directional penetration into the countries of the region. With the constant changes of the political, economic and security situation in the geopolitical space with Central Asia and Transcaucasia as the center, the United States has made three obvious readjustments in Central Asia and Transcaucasia , each adding some geopolitical weight.

为全面控制这一战略要地，十几年来，美国势力在国家战略的指导下对该地区国家进行了全方位的渗透，而随着美国国内外，特别是以中亚和外高加索为圆心的地缘政治空间政治、经济和安全形势的不断变化，美国的中亚和外高加索战略先后经历了3次较为明显的调整，每一次调整都加重一些地缘政治的分量。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。