圆周的

Eratosthenes knew that the distance between Alexandria and Syene was approximately 800 kilometers, because he hired a man to pace it out.

和Syene之间的距离约略是800公里，因为他雇用人用脚一步一步地走而算出来的。800公里乘上50是40，000公里：这应该是地球的圆周了。

In this paper, normalized cubic Gauss sums distribution at unit circle is studied by analytical methods.

本文运用解析的方法，研究模为算术级数中素数的正规化三次高斯和在单位圆周上的分布。

The graphic method was used drafting of orthographic projection and the calculating method was mad use of computer.

方法采用正投影绘图的图解法和计算机计算的计算法，方便快捷地解决了一般位置圆周透视的判断问题。

Therefore, it keeps the consistency in variation of grayness with traditional spectrogram, and guarantees the continuity of phase display, due to the continuity and recirculation of chromatic variation in the color space.

这样既保持了与传统谱图按灰度变化的一致性，又由于彩色空间色度变化的连续性和圆周重复性，保证了相位表示的连续性。

The regulator pin structure is configured such that part of the outer end of a hairspring that is situated beyond a reformed portion of the hairspring along the outer circumference direction is freely fitted in a gap between the legs.

快慢针结构这样设置：沿着外圆周方向，远离游丝矫正部分设置游丝的外端的部件活动地装配到两个腿之间的间隙中。

With a example, a incompact and coupling circle model of special operational C^4ISR system is described, and its concept, architecture and function are discussed minutely.

并以简单事例为导引，提出了一种基於地理信息系统的松散耦合圆周模型的特种作战 C^4ISR系统结构，并详细阐述了其概念、框架结构和功能设计，以及实现上的难点所在。

Second, a 3D unsteady-state numerical model of heat transfer in laser circular cutting of pipe was set up for the first time, and the kerf width, the cut front profile, the temperature field and the heat affected zone were calculated by using the model.

其次，首次建立了管材激光圆周切割传热过程的三维非稳态温度场计算模型，并计算了不同管径和切割速度条件下的切缝宽度、切割前沿及其相邻基材的温度场和热影响区大小。

The method of producing the pulley assembly may include modifying as by knurl (22 the outer flat circumferential surface of the metal insert prior to molding the plastic annular body about the metal insert, for clamping, structurally bonding, and resisting relative rotation between the plastic body and the metal insert.

生产滑轮组件的方法可以包括：在金属插入件周围模制塑料环形体之前，改变金属插入件的外圆周表面（例如通过压花（22）），以夹紧、在结构上连接及防止塑料体和金属插入件之间的相对转动。

We conclude that normalized cubic Gauss sums which modular is primes in arithmetic progressions are uniformly distributed around the circle and we get that there is no rule like quadratic Gauss sums.

并由此得出，模为算术级数中素数的正规化三次高斯和在单位圆周上是一致分布的。因此，在三次情况下不存在类似二次高斯和的判别准则。

The paper realizes the echo image and the interaction interface non-twinkle display by off-screen drawing , the echo image all-round sweep dynamic display and the simulation of functions of the sonar simulator.

通过离屏绘制实现了回波图像及人机交互界面的无闪烁显示，并实现了回波图像的圆周扫描动态显示和渔用声纳模拟器各种功能的模拟。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。