We all live on one big planet, we call Earth.
我们都生活在一个大的星球，我们称之为地球。
While a big planet goes round, it pulls its star to one side.
当一颗大行星环绕运动时，它会把别的星星拉到另一边。
The big planet throws a lot of comets out of the solar system, but it also throws them in.
这个大魔头向太阳系外扔了很多扫帚星，但又把它们引向了太阳系内部。
Such a big planet with a rocky core and a fluffy gaseous envelope probably can't support life as we know it.
如此大的一颗行星，有岩石地核以及蓬松的气体层包覆，可能不会维持我们所知的生命。
Most of the big planet announcements over the past year or two have come from the Kepler space mission, which looks for the slight dimming as a planet passes in front of its star.
在过去一两年中，大部分发现大型植物的公告是来自开普勒太空任务，其方法是搜寻植物在太阳前经过时那稀薄的浅影。
Many people know that rubbish is a big problem on planet Earth.
许多人都知道垃圾是地球上的一个大问题。
The fact that we now imagine our planet as a whole does not mean that the "rescue" of our planet will come with one big global stroke of genius and technology.
事实上，我们现在认为所在的星球是一个整体，这并不意味着对我们星球的“拯救”能靠着一次全球性的天才之举和技术就能实现。
Less than 20 years after first finding a planet beyond our solar system, astronomers are poised to hit a big milestone - the discovery of alien world no. 500.
首次发现太阳系以外的行星后不到20年，天文学家们正准备打造一个重要的里程碑——第500个外星世界的发现。
If a rocky planet is big enough - say, 10 times the mass of Earth - it can vacuum up so much hydrogen that its atmosphere ends up constituting most of the planet.
如果一个由岩石组成的行星足够的大——比方说，质量是地球的10倍——它可以吸收如此多的氢，以至于他的大气层最终会形成大部分的行星。
How we use those resources can make a big difference in determining the health of the planet, the well-being of others, even our own happiness.
而我们使用这些资源的不同方式将大大影响这个星球的健康，其他的人类，甚至我们自己的快乐。
By measuring the amount of starlight a planet blocks, astronomers can also calculate how big it is relative to the star.
通过测量星光金额行星块，天文学家还可以计算出它是相对于大明星。
If you want to know exactly how big a planet is, you need to know exactly how big the star is whose light it's blocking.
如果你想知道一个行星到底有多大，那么，你就要确切地知道那颗光线被阻断了的恒星体积的大小。
There are far easier pickings out there rather than landing on a planet filled with a civilization that takes great pride in building big weapons that could hinder attempts at mining the planet.
在那儿获取原料远比着陆在一个充满文明、对建造的能阻碍外星人采矿的大型武器引以为豪的星球上要容易得多。
If an asteroid that big struck Earth, firestorms could produce worldwide clouds of soot that would block sunlight and plunge the planet into an “asteroid winter.”
如果那么大的小行星袭击地球，引发的大火产生的烟尘会弥漫全球，遮蔽阳光，使地球进入“小行星冬天”。
But Saturn's fellow gas giant planet Jupiter has four big moons.
而和土星同样是巨大气质行星的木星却有4颗大卫星。
The oldest known planet is a primeval world 12.7 billion years old that formed more than 8billion years before Earth and only 2 billion years after the Big Bang.
最老的已知行星是一颗比地球早形成80多亿年，宇宙大爆炸20亿年后形成的太古级的127亿岁的行星。
But researchers can't know exactly how big the planet is unless they know the actual size of the star.
但是，研究人员还不能确切地知道地球有多大，除非他们知道的明星的实际大小。
Future observations will determine whether this is a planet or a brown dwarf, a gaseous body not big enough to begin the nuclear fusion process that makes stars shine.
进一步观测将会确定这是否是一颗行星，还是一颗褐矮星，即一个不够大，无法开始核聚变反应来发出光芒的气体星体。
The willows are access points, the Well of Souls and other places like it around the planet are like big servers, storage centers.
那些较小的柳树类似于存取点，而较大的灵魂之树像是巨大的服务器或储存中心。
It's thanks to institutions both big and small that people around the country are adopting this simple message of moderation and choice for their health and the health of the planet.
这得感谢大大小小的机构，全国各地的人们，为了自身和地球的健康，正采纳这一适度有选择的简单讯息。
This might suggest a giant planet, at least the size of Jupiter and maybe up to four times as big.
这也许意味着存在着一个巨大的星体，至少有木星那么大，或者更达到木星的四倍大小。
At Epcot the main attraction (that big giant Epcot ball) houses Spaceship Earth; a ride that takes you back through the history of our little planet.
在未来世界，最主要的景观（巨大的爱波皮卡球）内有太空船地球；星球历史之旅。
A big moon likely could have helped stabilize Mars' orbit, but the planet has just two small moons, most likely captured asteroids, that don't have much gravitational muscle.
一个月亮很可能帮助稳定火星的轨道，但是它也有两个小的卫星，很可能是被捕获的小行星，他们根本就没有足够的引力能束缚。
The big question is whether the planet will disappear in the twinkling of an eye.
最大的问题在于地球是否会在转瞬之间消失。
Hopefully Jobs's most important legacy will be that the products he created won't have too big of an impact at the end of their lives on either people or the planet.
但愿乔布斯最为宝贵的遗产是，他所创造的产品在报废使用前不会对人和地球产生太大的不良影响。
City boys drive around in big cars and snort cocaine, neither of which activities is very planet-saving, and just imagine Tony Blair's carbon footprint.
还有城市里开着名车吸着可卡因的小伙(两类活动均对保护地球无益)，顺便再想想托尼·布莱尔的碳足迹。
With operations in nearly every corner of the planet, Exxon always seems to get a seat at the table when big projects arise.
埃克森的业务几乎遍布世界各个角落，似乎在新项目出现时总能占有一席之地。
But the chance that we're on course to render big chunks of the planet uninhabitable sort of eclipses that.
但是按规定我们有机会提出“不适宜地球居住的大块”(big chunksofthe planet uninhabitable)等如同日食一样的提案。
But the chance that we're on course to render big chunks of the planet uninhabitable sort of eclipses that.
但是按规定我们有机会提出“不适宜地球居住的大块”(big chunksofthe planet uninhabitable)等如同日食一样的提案。
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