In 1664 Hooke observed a reddish spot on the surface of the planet.
1664年，胡克观察到了那颗行星表面的一个微红的斑点。
We are reproducing ourselves at such a rate that our numbers threaten the ecology of the planet.
我们繁衍得如此之快，以至于人口数量威胁到地球的生态系统。
In reality, sea level varies according to the irregular interior of the planet.
事实上，海平面会根据地球不规则的内部而变化。
Additionally, the gears also moved to match the motions of the planet and predicted eclipses.
此外，齿轮也会根据与行星运动的匹配和日食预测而移动。
You see how this epicycle theory could account for the seemingly backward motion of the planet.
你可以看到这个本轮理论是如何解释行星看起来像在做反向运动的。
Across much of the planet, forests of slow-growing ancient trees have been cleared for human use.
在地球上的许多地方，生长缓慢的古树森林已被砍伐一空，以供人类使用。
In Earth's early days, all over the planet countless photosynthetic bacteria performed photosynthesis.
在地球早期，整个星球上有无数的光合细菌在进行光合作用。
However, if the planet is in a good position, astronomers look for three key things: water, air and rock.
然而如果这颗行星处于很好的位置，天文学家会寻找三样关键的东西：水、空气和岩石。
Another question remains: what prevents the planet from continuing its spiral until it collides with the star?
还有一个问题：在与恒星相撞之前，是什么阻止了这颗行星继续螺旋运动？
Mercury is a liquid metal, and Mercury, the planet, is the fastest moving heavenly body that naked eyes can see.
水银是液态金属，行星水星是肉眼能看到的运动最快的天体。
Migration helped create humans, drove us to conquer the planet, shaped our societies, and promises to reshape them again.
移民帮助创造了人类，驱使我们征服了地球，塑造了我们的社会，并承诺再次改变他们的形态。
For the Earth to maintain a constant average temperature, such emissions from the planet must balance incoming solar radiation.
为了使地球保持恒定的平均温度，来自地球的这种辐射必须平衡入射的太阳辐射。
Scientists are studying photographs of the planet for signs of life.
科学家仔细察看行星照片，寻找生命迹象。
The gases that may be warming the planet will have their main effect many years hence.
这些可能正在使行星变暖的气体，其重要影响将在许多年之后显现。
The planet is one of 119 known extra-solar planets, objects that orbit stars other than the sun.
这是119颗太阳系外行星中的一颗。这些行星围绕除太阳外的其他星体运行。
It went across one-fourth of the planet.
它跨过了地球的四分之一。
It is helpful to both people and the planet.
它对人类和地球都有帮助。
One day, a little boy was walking on the planet.
有一天，一个小男孩在这个星球上行走。
They think being a vegetarian can help the planet.
他们认为成为素食者有助于地球。
Here are our top five unusual sports from around the planet.
以下是来自世界各地的五种最特别的运动。
Clearly, the planet cannot keep such a high rate of forest loss.
显然，地球无法保持如此高的森林损失率。
Polar bears are the largest land animals that eat meat on the planet.
北极熊是地球上最大的陆地肉食动物。
Scientists say the Arctic is warming twice as fast as the rest of the planet.
科学家称北极变暖的速度是地球其他地区的两倍。
To his surprise, the rose was dead, and the planet was full of monkey bread trees.
令他惊讶的是，玫瑰凋谢了，星球上到处都是猴面包树。
I didn't focus on bites, but instead I read about how helpful ants are to the planet.
我没有把注意力放在叮咬上，而是阅读了蚂蚁对地球的帮助。
When humans first emerged as a species, they shared the planet with many types of ape.
当人类首次作为一个物种出现时，他们依旧跟多种类人猿共存。
Lying on the grass, they saw different kinds of stars and they even saw the planet Mars.
他们躺在草地上，看到了各种各样的星星，甚至还看到了火星。
There was a bit of me that didn't want to love this story when everyone else on the planet did.
当这个星球上的其他人都喜欢这个故事时，我却有点不喜欢它。
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