航天器于2004年发射，在今年三月进入轨道发回地球第一个特写图像之前，它已飞越水星三次。
Launched in 2004, the spacecraft flew by the planet three times before entering orbit in March of this year, when it sent the first close-up images back to Earth.
Huronian冰河期的早期，也就是从24亿到23亿年前，似乎特别寒冷，整个地球第一次冰冻起来。
The early stages of the Huronian, from 2.4 to 2.3 billion years ago, seem to have been particularly severe, with the entire planet frozen over in the first "snowball Earth".
这差不多是地球的2.5倍！这是第一次可口可乐公司表示它每年使用300万吨塑料瓶。
That's nearly two and a half times around Earth! For the first time, Coca Cola has shown that it uses 3,000,000 tons of plastic bottles each year.
该展览由纽约非营利性机构“地球誓言”组织，它激励了许多顶级设计师第一次使用可持续性面料。
Organized by the New York-based nonprofit Earth Pledge, the show inspired many top designers to work with sustainable fabrics for the first time .
第一个是一对质量与木星差不多的行星，这对行星步调一致地围绕距离地球15光年的母恒星旋转。
The first is a pair of planets, each about the mass of Jupiter, that whirl around their home star 15 light years from Earth in perfect lockstep.
第一集就是真正的第一集，讲述了地球的毁灭。
The first episode is the real first episode, which tells about the destruction of the earth.
第一个在地球轨道之外执行的私人任务比我们预想的更早。
The first private mission outside of Earth's orbit is closer than many of us think.
当第一次用望远镜观测到火星时，人们从飞机上看到，火星的圆盘在地球上纵横交错。
When the planet Mars was first observed through a telescope, people saw that the round disk of the planet was crisscrossed on earth that are viewed from an airplane.
当第一次用望远镜观测到火星时，人们从飞机上看到，火星的圆形圆盘在地球上纵横交错。
When the planet Mars was first observed through a telescope, people saw that the round disk of the planet was criss-crossed on earth that are viewed from an airplane.
这一成功也使嫦娥五号成为自1976年俄罗斯飞船将170.1克样本带回地球以来，第一个从月球带回样本的航天器。
The success has also made Chang'e-5 the first spacecraft to bring back samples from the moon since 1976 when a Russian spaceship brought back 170.1 grams of samples to the earth.
一些科学家认为，5亿年前出现在地球上的第一批植物可能看起来是紫色的，而不是绿色的。
Some scientists believe that the first plants to appear on Earth over 500 million years ago probably looked purple, not green.
最近，中国的“嫦娥四号”月球着陆器携带的迷你花园成为了第一个地球之外的种植地。
A mini garden carried on China's Chang'e 4 moon lander recently became home to the first plant to grow on another world.
1992年，第一届联合国地球峰会在里约热内卢举行。
In 1992, the first UN Earth Summit was held in Rio de Janeiro.
很高兴见到你，第一个已知的穿越银河系来到地球的旅行者。
It's a pleasure to meet you, the first-known trans-galactic visitor to Earth.
在我们地球的历史上，这是第一次有一个物种——我们的人类——掌握了地球的未来，不仅可能危及其本身，而且可能危及生命的巨大潜力。
It's the first in our planet's history where one species - ours - has Earth's future in its hands, and could jeopardise not only itself, but life's immense potential.
然而它并不是第一个在长距离拍摄地球的飞船。
It is not, however, the first to get a long-distance shot of Earth.
这是世界上第一张在月球附近看到地球照片。
Thisphoto was the world's first view of Earth taken near the moon.
这张著名的“蓝色大理石”照片是地球全景的第一张照片。
This famous \"Blue Marble\" shot represents the first photograph in which Earth is in full view.
自从几十亿年前地球上出现第一个生命开始，气候就剧烈地变化着，时常是从一个时期突然进入另一个时期——从炎热的湿季到冰冻期。
From the moment life began on the planet billions of years ago, the climate has swung drastically and often abruptly from one state to another - from tropical swamp to frozen ice age.
研究人员一直试图解释氨的来源，引起地球上第一个生物分子的形成。
Researchers have long been trying to explain the origin of the ammonia that triggered the formation of the first biomolecules on Earth.
燃烧的凯霍加画面震惊了整个美国，而且致使美国威斯康星州一位参议员翌年举办了第一个地球日呼吁关注无视环境的危险。
Images of the burning Cuyahoga shocked anation, and it led one Wisconsin Senator the following year to organizethe first Earth Day to call attention to the dangers of ignoring ourenvironment.
最后结果在佛罗里达州宣布，日期是第一次航天飞机飞行30周年以及苏联宇航员尤里·加加林成为绕地球轨道飞行第一人50周年纪念日。
The announcement in Florida came on the 30th anniversary of the first space shuttle flight and on the 50th anniversary of Soviet cosmonaut Yuri Gagarin becoming the first human to orbit the earth.
2008年，地球上第一次有超过半数的人居住在城市中。
In 2008, for the first time, more than half the planet's people lived in cities.
尽管前苏联抢占了太空竞赛的先机，第一艘绕行星而不是地球飞行的太空船来自美国，第一位登月宇航员也是美国人。
Although the Soviet Union initially led the space race, the first spacecraft to fly by a planet other than Earth was an American one, and the first man on the moon was also an American.
(地球工程)并不是我们第一选择的措施。
[Geo-engineering] is not something we're going to want to use as a first choice.
2007年9月发射的曙光号一直在成为第一个进入地球之外两个太阳系系统目的地的轨道的路上。
Dawn, which launched in September 2007, is on track to become the first spacecraft to orbit two solar system destinations beyond Earth.
我们都想帮助地球，因为它是我们的第一个家。
我们都想帮助地球，因为它是我们的第一个家。
我们都想帮助地球，因为它是我们的第一个家。
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