This paper introduces the theory of Resistivity tomography and expounds the characters of pole-pole array、depole-depole array and equatorial depole-depole array and explains how to carry out 3-D surveys with these arrays.
介绍了三维电阻率层析成像技术的方法原理以及单极、轴向偶极和赤道偶极装置的特点;并用德国resecs电阻率测量系统对这三种装置的应用效果进行了比较;且对二维观测与三维观测进行了对比实验。
In this paper, We discuss the existence of the equatorial limit circler of a class of cubic systems by using the method of Poincare transmations.
本文用Ｐｏｉｎｃａｒｅ＇变换的方法研究一类三次系统存在赤道极限环的条件。
Center-Focus Determination and Bifurcation of Limit Cycles of the Equator for Planar Polynomial Differential Systems;
平面多项式微分系统中心焦点判定与赤道极限环分支
The equator. Used with the.
赤道赤道。和the连用
than that from the equator to the South Pole.
比赤道到南极间的距离稍远，
The flattening and swelling are too small to see.
两极的扁平和赤道的凸出都无法察觉。
Water tends to move from the poles toward the equator.
因而水会倾向于由极区往赤道地区移动。
As a result the earth bulges slightly at the equator and is slightly flattened at the poles.
结果，地球在赤道上微微凸出，而在两极微微扁平。
a great circle on the celestial sphere that passes through both celestial poles.
通过天体球两极与天体赤道成直角相切的大圈。
The equator is a great circle midway between the North and South Poles.
赤道圈是一个位于南北极当中的大圆周。
A Method of Precisely Adjusting the Polar Axis of an Equatorial Radio Telescope
一种赤道式射电望远镜极轴的精密校准方法
On the application of the stereographic projection in the stability evaluation of the tunnel's surrounding rocks
赤平极射投影在隧道围岩稳定性评价中的应用
Equatorial Customs Union
赤道关税同盟(赤道税盟)
The earth is slightly flat at the poles, so that the polar diameter is slightly less than the equatorial diameter.
地球在两极扁平一点，所以其极直径略小于赤道直径。
Similarly, in equatorial and polar marine regions, ocean temperatures change very little with season.
同样，在赤道和极地海区，海水温度的季节变化也相当
The centrifugal force caused by the earth's rotation decreases from a maximum at the equator to zero at the poles.
地球自转产生的离心力从赤道的最大值降低到极地的零值。
The trade wind cell is, on the average, confined to30 degrees poleward of the equator.
平均来说，信风圈限于离赤道（极地方向）0度的纬度带里。
It has a circumference of about forty thousand kilometers, a polar diameter of twelve thousand seven hundred and fourteen kilometers, and an equatorial diameter of twelve thousand seven hundred and fifty-six kilometers.
它的周长约为40000公里，南北极直径约12714公里，赤道直径为12756公里。
an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator.
穿过地球南北极且与赤道垂直的假想的地球表面的大圆。
Except at the pole and the equator, a plumb line does not point toward the earth's center.
除在地球的两极和赤道之外，铅锤线并不指向地球中心。