所以地球上的火山有好几种类型，而在金星上的火山只有一种。
So while on Earth we have several types of volcanoes, on Venus there's mostly the one type.
比如，地球比月球含的物质多，所以地球的拉力或引力就比月球大。
For example, the earth has more matter than the moon, so the earth's pull or gravitation is stronger than the moon's.
由此断定月球的轨道主要由来自太阳的牵引力决定，所以地球对于太阳的轨道一直是椭圆形的。
It follows that the Moon's orbit is primarily determined by the gravitation pull from the Sun, so the orbit of the Earth will always curve towards the Sun.
因为内核失去在其形成时捕捉的热能，而且是通过内核里的放射性元素产生的热能，所以地球正渐渐冷却下来。
The Earth is growing cooler as it loses the heat trapped in its creation and generated by radioactive elements within it.
上周四，《地球物理研究快报》刊登了这项研究的一些数据。因为这些只是2006年10月至2007年6月期间的数据，所以地球在夏季发出嗡嗡声的方式可能会有所不同。
The data for this study, published Thursday in Geophysical Research Letters, was gathered from November 2006 to June 2007, so humming patterns might be different during the summer months.
因为地球旋转，所以它不是个完完全全的球体。
我们只有一个地球，所以我们必须要照顾好她。
本世纪世界人口增长了两倍多，世界产出也大幅增长，所以你会认为地球本身也受到了影响。
The world's population has more than tripled during this century, and world output has risen hugely, so you would expect the earth itself to have been affected.
所以我会步行到宇宙飞船那里，然后驾驶飞船回到地球。
以前人们认为地球是平的，所以人类从未征服过地球。
Believed to be flat, the earth was never conquered by human beings.
由于金星离地球更近，所以它的视差角会更大。哈雷计算出，利用金星可以测量出太阳与地球之间的距离，误差为五百分之一。
As Venus was closer to the Earth, its parallax angle would be larger, and Halley worked out that by using Venus it would be possible to measure the Suns distance to 1 part in 500.
因为那里完全没有阳光，所以不可能有光合作用的生命，但像在地球深处蓬勃生长的微生物之类的生命可能仍然存在。
Photosynthetic life is impossible there because sunlight is completely absent, but life such as the microbes that flourish deep within earth may still be possible.
尽管地球的水资源丰富，但由于海水不能直接被利用，所以仍有许多地方缺水。
Even though our earth is rich in water resource, there is still a shortage of water in many places because ocean water can't be used directly.
地球气候发生变化，部分地区的降雨变得更加难以预测，所以这些答案将变得更有价值。
As the earth's climate changes and rainfall becomes even less predictable in some places, those answers will grow even more valuable.
因为早期的地球大气中缺乏氧气，所以也缺乏起保护作用的臭氧层屏障。
Because early Earth lacked oxygen in its atmosphere, it also lacked a protective ozone barrier.
地心论是指以地球为中心，所以地心论认为，太阳、行星和恒星都围绕着地球旋转，而地球是静止的。
Geocentric means Earth-centered, so the geocentric view holds that the Sun, the planets, and the stars, all revolve around the Earth, which is stationary.
所以沉积物被运输，然后沉积，随着时间的推移，它在地球表面形成了层。
So sediment is transported and then deposited and it forms layers on the Earth's surface over time.
所以农业的扩张很可能对地球大气的组成产生深远的影响。
So the spread of agriculture could very well have a profound effect on the composition of Earth's atmosphere.
所以他根据事实推断，认为太阳中有一种元素在地球上还没有被发现。
So he put two and two together, and decided there was an element in the sun that hadn't been discovered here on the earth yet.
地球之所以能够维持生命，是因为它相对于太阳的位置为它提供了足够的热量，但热量没有多到可以让早期的细菌进化。
Earth has been able to support life because its position relative to the Sun provided it with enough heat, but not too much heat for early bacteria to evolve.
因为地球不如贝莎的家乡好，所以我们应该努力改善我们的地球。
We should try to improve our earth as Berthas hometown is much better.
但它离太阳的距离比地球远，所以火星上的温度要低得多。
It is further from the Sun than the Earth, so temperatures on Mars are much lower.
月球未知的一面总是远离我们，所以我们从地球上永远看不到它。
This is the unknown face of the moon that is always looking away from us, so we never see it from down here on the earth.
动物和人类在地球上共享空间，所以与我们周围的动物保持健康的关系，符合我们的最大利益。
Animals and humans share space on Earth, so keeping a healthy relationship with animals around us is in our best interest.
地球上的自然资源是有限的，所以人们应该明智地利用它们。
Natural resources on the Earth are limited, so people should use them wisely.
月球的引力是地球引力的六分之一，所以嫦娥四号的实验是一个测试：地球上的植物能知道月球上哪个是向上的方向吗？
The moon's gravity is a sixth as strong as the earth's, so Chang'e-4's experiment was a test: would the earth plants know which way was up on the moon?
美国国家航空航天局之所以使用“气候变化”这个词，是因为这个词更准确地反映出由于大气中温室气体总量增多而对地球造成的大范围变化。
NASA used the term "climate change" because it more accurately reflects the wide range of changes to the planet caused by increasing amounts of greenhouse gases in the atmosphere.
所以我们要好好利用地球上的水。
所以我们要好好利用地球上的水。
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