在一些情况下，完全可以采用平面地球模型，通过牺牲一些精确性来获取速度。
In some cases, it is perfectly acceptable to assume a flat model of the Earth and lose some accuracy in exchange for speed.
但是为了实现本文的目的，我将使用平面地球模型和大圆弧长距离来演示距离，其他方法留给读者探索。
For the purposes of this article, I will demonstrate distances using the flat-Earth model and the great-circle distance and leave the rest to you to explore.
从根本上解决了常规测斜计算中“平面地球”模型所带来的不足，进一步提高了测斜计算的精度。
The new revision method basically has resolved the problems of "Plane Earth Model" and has improved the accuracy of well survey calculation.
地球是内行星中唯一一个有大卫星的，它的轨道既不在地球的赤道平面上，也不在其他行星所在的平面上。
Earth is the only one of the inner planets with a large satellite, the orbit of which is neither in the equatorial plane of Earth nor in the plane in which the other planets lie.
事实上，海平面会根据地球不规则的内部而变化。
In reality, sea level varies according to the irregular interior of the planet.
死海位于海平面以下430米，是地球陆地上的最低点。
At 430 meters below sea level, the Dead Sea is Earth's lowest point on land.
英国人认为，如果提升海平面，会将假想的线从沿地球曲线的海岸延伸到喜马拉雅山下方的某个点。
The British assumed that carrying in sea level would extend an imaginary line from the shore along Earth's curve to a point beneath the Himalaya.
纸上或屏幕上的地图是平面的；它们需要从地球的曲面向平面进行转换：地图投影。
Maps (on paper or on the screen) are flat surfaces; they require a transformation from the curved surface of the earth to the flat plane: a map projection.
这幅图片从黄道平面的视角捕捉到地球、月球和太阳排成一条直线的瞬间画面。
This image captures a momentary line-up looking out along this fundamental plane of our solar system.
我们之所以很少能看到这么薄的星系，主要是由于我们的地球一定要处在(接近于)这些超薄盘状星系据推测所在的平面内才能看到薄的那一面。
Galaxies that appear this thin are rare mostly because our Earth must reside (nearly) in the extrapolated planes of their thin galactic disks.
空间引用系统的第二部分是投影，它定义了如何将地球表面放置在2 - d平面上。
The second part of a spatial reference system is its projection, which defines how to lay out the Earth surface onto a 2-d surface.
他们将世界描绘成一个平面的圆盘，这也显示出巴比伦人认为地球是平的。
They depict4 the world as a flat disc, which shows that the Babylonians thought the earth was flat.
在过去的几年中，科学家已就持续变暖的气候会如何影响地球做出了种种推测，真实的数据至少已经证实了其中的一些：海平面正在明显上升；
Scientists have made lots of projections over the past few years about how warming temperatures and a changing climate will affect the planet.
括地球在内）都沿着轨道绕着太阳公转。这代表太阳系平面，学名“黄道”。
the planets, Earth included, orbit around the sun on this celestial sheet.
但2010TK 7可能不会被选为目标星体，因为它的行进偏离地球轨道平面的距离过大，使得抵达它需要耗费大量燃料。
TK7 is probably not the rock of choice, simply because it travels too far above and below the plane of Earth's orbit, which would require a lot of fuel to reach it.
当地球沿着轨道绕太阳公转的时候，从平面这边的下端开始，以地球为参照物，这也能看成太阳沿着轨道绕我们运转。
We can also imagine that while the Earth orbits around the sun, from down here on the surface, it can look like the sun orbits around us.
除了这个，还能得到半径的大小，速度以及周期，假设你在地球上，和这些恒星环绕的，轨道同处一个平面。
And out of this information you get the radius, the velocity and the period, assuming that you are on Earth in the plane of the orbit of the stars.
黄道平面是一个假想的平面，理论上它包含了地球环绕太阳运行的轨道。
The ecliptic plane is defined as the imaginary plane containing the Earth's orbit around the sun.
在未来几十年没有行星直线排列问题，地球也不会在2012年跨越银河平面，即使出现此类排列方式，对地球的影响也可以忽略不计。
There are no planetary alignments in the next few decades, Earth will not cross the galactic plane in 2012, and even if these alignments were to occur, their effects on the Earth would be negligible.
北极地区气候的整体解冻变暖以及海平面逐渐上升，使得这些岛屿比起地球上其他任何地球都消逝更快。
The overall thawing of Arctic climates, as well as increasing sea level rise, have these islands retreating more rapidly than elsewhere in the world.
海洋就像地球的温度计，温度升高，海平面就像温度计中的水银一样上涨。
Acting as the earth's heat sink, the oceans expand like the mercury in a thermometer.
地球上格陵兰和南极巨大的陆地冰盖上，同样的力量在起着作用。这两处冰盖控制的冰足以提高海平面60米。
The same forces are at work on the planet's giant continental ice sheets on Greenland and Antarctica, which together hold enough ice to raise sea levels by 60 metres.
地球的自转轴与黄道面呈一定角度。黄道面是地球公转轨道所在的一个假想平面。
The Earth's axis of rotation is tilted in relation to the ecliptic plane, an imaginary surface through Earth's orbit around the sun.
试想下平面地图和球形地球之间的区别。
Think about the difference between a flat paper map and a spherical globe.
地球两极的大冰原一旦开始融化就会快速地分解，而海平面每世纪升高几米也不是危言耸听。
The ice sheets at the poles can disintegrate rapidly once they start melting, and sea-level rises of a few meters per century are not unheard of.
当然，可由此从行星地球的天空中辨认太阳的运行轨迹，黄道平面在北半球夏季七月的天空中的位置很低。
Of course, defined by the path of the Sun through planet Earth's sky, the ecliptic plane rides low during July nights in the northern hemisphere's summer skies.
图上精确的地球大地水准面是根据洋流、海平面的变化和地球冰川等元素的精确数据测量而成。
A precise model of Earth's geoidis crucial for deriving accurate measurements of ocean circulation, sea-level change and terrestrial ice dynamics.
图上精确的地球大地水准面是根据洋流、海平面的变化和地球冰川等元素的精确数据测量而成。
A precise model of Earth's geoidis crucial for deriving accurate measurements of ocean circulation, sea-level change and terrestrial ice dynamics.
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