| 释义 |
赤道chìdào
1.环绕地球表面距离南北两极相等的圆周线。它把地球分为南北两半球,是划分纬度的基线,赤道的纬度是0°。{equator, imaginary line around the surface of the earth equidistant from its poles. Dividing the earth into the southern and northern hemispheres, the equator is the basic line from which to calculate latitude. The latitude of the equator is zero.}
2.指天球赤道,就是地球赤道面和天球相交形成的大圆圈。{celestial equator; great circle of the celestial sphere, lying on the same plane as the earth's equator} |