沿着赤道使用维度和经度相当简单，形成的网格线大致也是方形的。
Using latitude and longitude is easiest along the equator, where the grid lines formed are roughly square.
根据空中某个物体与地平线之间的角度可以确定纬度，然后根据地球旋转计算出经度。
You can determine latitude from the Angle between a celestial object and the horizon, and you can calculate longitude from the Earth's rotation.
本初子午线处于0度经度，而国际日期变更线处于180度经度。赤道处于0度纬度。
The prime meridian is at 0 degrees longitude, and the international date line is at 180 degrees. The equator is at 0 degrees latitude.
福克在向东走的路上一直是迎着太阳升起的方向前进，所以每当他这样走过一条经度线，他就会提前四分钟看见日出。
In journeying eastward he had gone towards the sun, and the days therefore diminished for him as many times four minutes as he crossed degrees in this direction.
国际本初子午线大会于1884年把横过英国格林尼治天文台的一条经线定为参考线，在该线上经度为零。
The Greenwich meridian was adopted in 1884 by the International meridian Conference as the line with zero degrees of longitude.
在球体表面上的一条直线，就是你可能画出的最大圆，就像是赤道或经度线。
And on the surface of a sphere, a straight line is the biggest possible circle you can draw.
GMT是一种通用时区，是根据格林威治子午线，用设定时间所在位置的经度与其求差计算出来的。
GMT is a universal time zone, based on the Greenwich meridian corrected by the longitude of the location in which the time is set.
但是，我们必须注意，如果说这位绅士按照地球经度子午线计算他才走完了一半路程，那么事实上他已经完成了三分之二以上的旅行计划。
Then it just became a matter of how we got the timber from the yard, over the fence, to the park and up the tree.
但是，我们必须注意，如果说这位绅士按照地球经度子午线计算他才走完了一半路程，那么事实上他已经完成了三分之二以上的旅行计划。
Then it just became a matter of how we got the timber from the yard, over the fence, to the park and up the tree.
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