如果太空飞船的速度能超过光速，船上的一天将相当于地球上的一年。
If spaceships that can fly faster than the speed of light were built, a day on board would be equivalent to a year on Earth.
当地球的轨道更接近椭圆时，地球实际上在一年的一部分时间里更接近太阳。
When Earth's orbit is more elliptical, Earth is actually closer to the sun during part of the year.
一年以前，Google推出了Google出版计划，给地球上的每一本书进行扫描。
A year ago, Google offered to scan every book on the planet for its Google Print project.
这是地球上最有效的太阳能转化过程，如果将太阳光照射地球表面一个小时产生的所有能量聚积起来，就足以满足人类整整一年的能源需求。
It is the most effective solar energy conversion process on Earth and all power needs for a year could be met by the energy contained in the sunlight hitting the Earth in one hour.
尘埃碎片从地球上神秘的，第3200号小行星“法厄同”穿过，使得每年的双子座流星雨成为了一年中最好的流星雨。
Created as planet Earth sweeps through dusty debris from mysterious, asteroid-like, 3200 Phaethon, the annual Geminid meteor shower should be the best meteor shower of the year.
科学家把地球上可饮用的淡水——包括湖泊、河流和蓄水层的水统称为“深海”，人类每一年能够使用大约三分之一的“深海”。
Of all the fresh water accessible in lakes, rivers and aquifers — what scientists call “blue water” — humankind uses about one-third every year.
在每一年的春分点上，太阳横跨着地球上的赤道，使得地球上大部分地区的白天和夜晚的时间接近相等。
At each equinox, the sun crosses the Earth's equator, making night and day of approximately equal length on most of the planet.
在一年里这两个时间点上，太阳出现在赤道的正上方，并且在地球上绝大多数地方，白天与夜间的长度是相同的。
At these times of the year, the sun appears to be directly over Earth's equator, and the lengths of the day and the night are equal over most of the planet.
即便除去辐射到茫茫太空中的大部分，每小时到达地球的能量理论上仍可供人类使用一年。
Even taking into account the all the energy that's lost in space, enough still reaches Earth in an hour to power the entire planet, theoretically, for a year.
然而，每一年有数以千计的物种，从最小的微生物到个头较大的哺乳动物，永远地从地球上消失了。
Yet each year thousands of species, ranging from the smallest microorganisms to larger mammals, are lost for good.
在1955年，两个天文学家计算出冥王星的“一天”几乎是地球上的一个周，而它的“一年”则是248个地球年。
In 1955, two astronomers figured out that Pluto had a "day" of almost a week and a "year" of 248 Earth years.
火星上的一天只不过比地球上的一天长大约40分钟，但是一年却要持续687天。
A day on Mars is only about 40 minutes longer than a day on Earth, but a year lasts 687 days.
地球上的生命总会逝去，此消则彼长，一天之计、一年之计的初生生命也会让我们欣喜不已。
Life has never ceased its step of disappearing and regenerating. New born lives have always delighted us by and even by a year.
一条解释为什么会是这样的线索也许在于开普勒314c星的轨道靠近她的母恒星这个事实—它的“一年”只有地球上23天。
One clue as to how this happened might lie in the fact that Kepler 314c orbits close to its parent star-its "year" is 23 terrestrial days long.
在阿布扎比举行的第四届一年一度的世界未来能源峰会上，潘基文表示，可再生能源能够解决地球上最紧迫的几个问题。
Speaking at the fourth annual World Future energy Summit in Abu Dhabi, Ban said renewable energy could help solve a number of the planet's most pressing problems.
在阿布扎比举行的第四届一年一度的世界未来能源峰会上，潘基文表示，可再生能源能够解决地球上最紧迫的几个问题。
Speaking at the fourth annual World Future energy Summit in Abu Dhabi, Ban said renewable energy could help solve a number of the planet's most pressing problems.
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