circle of longitude造句

• A degree or circle of longitude or latitude drawn on a map or globe
  经线，纬线，经纬度地图或地球仪上的经纬线或经纬度
• The ecliptic coordinate system is defined as one which uses the ecliptic and the vernal equinox as the zero point . the ecliptic longitude of a body is the angular distance from 0 to 360 from the vernal equinox , measured eastwards along the ecliptic to the intersection of the body s circle of longitude
  黄道是太阳在天球运行的轨道黄道座标系统是以黄道为基础的座标系统：黄道经度是以春分点为零度的大圆圈，向东起计共360度，而天体的黄道经度是天体的经圈与春分点的角距离。