全球定位系统在赤道附近性能最好。
赤道是一条假想的环绕地球腰部的线。
The equator is an imaginary line around the middle of the earth.
所有行星基本在同一个平面上围绕太阳赤道运转。
All the planets orbit the Sun in roughly the same plane, around its equator.
在赤道山区，低生长形态较不普遍。
In the equatorial mountains the low growth form is less prevalent.
在南半球，冬天已经开始，赤道以北是夏天。
In the Southern hemisphere winter has begun, and it is summer north of the equator.
每年的这个时候，太阳出现在地球赤道的正上方。
At these times of the year, the sun appears to be directly over Earth's equator.
太平洋岛民成功的关键可能是他们靠近赤道的位置。
The key to the Pacific islanders' success was probably their location near the equator.
这意味着天空可以被分割开来，比远离赤道的地方要对称得多。
What that meant was that the sky could be partitioned, divided up, much more symmetrically than it could farther away from the equator.
它们只出现在赤道地区，一般不会形成广泛的相互连通的网络。
They appear only in equatorial regions and generally do not form extensive interconnected networks.
当磁场最强，太阳黑子最丰富的时候，它们会聚集在赤道附近。
When the magnetic field is at its strongest, and sunspots at their most plentiful, they cluster close to the equator.
我们的地球相对来说比较小，绕赤道一周只有24902英里。
Our planet Earth is comparatively small, with only about 24,902miles around the equator.
尤其对于那些生活在赤道附近的人来说，它的盈亏比季节的变化更为明显。
For those living near the equator in particular, its waxing and waning was more conspicuous than the passing of the seasons.
准确地说，热带雨林生长在高降雨量的赤道地区，这些地区全年保持湿润。
Properly speaking, tropical rainforests grow in high-rainfall equatorial areas that remain wet or humid all year round.
从极地盖帽到赤道森林，这是不可逆转的世界，这就是我们拥有的所有自然。
It is this irreversibly modified world, from the polar caps to the equatorial forests, that is all the nature we have.
这在人类历史上确实是一场重要的革命，因为它允许我们继续在赤道环境中进化。
This was really an important revolution in human history, because it allowed us to continue to evolve in equatorial environments.
“好奇号”实际所在的位置是火星赤道附近一个名为盖尔的96英里宽的陨石坑。
Where the Curiosity actually sits is a 96-mile-wide crater named Gale near the Martian equator.
我们需要的是一个在赤道处地面上的非常高的塔，以及沿地球静止轨道绕地运转的卫星。
What we need is a really tall tower here on the ground right at the equator and a satellite in geostationary orbit.
他们可以追踪大陆冰川的生长和收缩，即使是在温度变化不大的海洋区域——比如，赤道附近。
They could trace the growth and shrinkage of continental glaciers, even in parts of the ocean where there may have been no great change in temperature—around the equator, for example.
在塔尔西斯高原上发现了三座非常大的火山。塔尔西斯高原是火星赤道附近一片广阔的地质区域。
Three very large volcanoes are found on the Tharsis bulge, an enormous geologic area near Mars's equator.
这大约是一个物体从赤道沿轨道垂直向上运行的高度，这样它就可以一直保持在地球同一地点的正上方。
That's about how high an object would have to be orbiting straight up from the equator to constantly remain directly above the exact same spot on the rotating planet Earth.
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.
只有在全球气温变化开始和海平面反应之间的短暂滞后期间，适应气候变化的物种才能从赤道向高纬度地区迁移。
Only during the short lag between onset of global temperature change and sea level response can warm-adapted species migrate from the equator toward higher latitudes.
在气候变冷期间，大多数迁徙者预计将前往靠近赤道的非洲，因为在气候变冷的地球上，这是栖息地变化所决定的方向。
During cooling most migrants would be expected to travel toward Africa, which is near the equator, since this is the direction dictated by habitat changes on a cooling Earth.
他毫不气馁，继续留在赤道以南，在动身前往菲律宾观察下一个过境点之前，他一直忙于研究毛里求斯和马达加斯加群岛。
Undaunted, he remained south of the equator, keeping himself busy by studying the islands of Mauritius and Madagascar before setting off to observe the next transit in the Philippines.
在赤道以北，这些被称为东北风。
To the north of the equator these are called north-easterlies.
这足以让一辆电动汽车行驶约3.7亿公里，是地球赤道的9250倍长。
This is enough to make an electric car drive about 370 million km, which is 9,250 times as long as the earth's equator.
它们一直在赤道附近摇摆，直到消失。
阿特拉斯是两者中较平整的一个，极点间的直径只有18公里，但它的赤道周长却有40公里。
Atlas, the flatter of the two, has a diameter of only 18 kilometers from pole to pole but is almost 40 kilometers across its waist.
赤道以南是树木点缀的草原，称为热带稀树草原。
South of the equatorial region is the tree-dotted grassland called the savanna.
美国位于赤道以北。
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