The Earth orbits in an ellipse.
地球沿椭圆形轨道运动。
The earth revolves on its axis.
地球环绕自身的轴心转动。
The earth is almost 25 000 miles in circumference.
地球的周长大约为25 000英里。
Eighty million years ago, dinosaurs ruled the earth.
八千万年前，地球是恐龙的天下。
The ancients conceived the earth as afloat in water.
古人认为地球漂浮在水里。
Mars takes longer to revolve on its axis than the earth.
火星自转一周的时间比地球长。
The moon exerts a force on the earth that causes the tides.
月球对地球的吸引力引起潮汐。
The ozone layer shields the earth from the sun's ultraviolet rays.
臭氧层保护地球不受太阳紫外线的辐射。
The earth would be a frozen ball if it were not for the radiant heat of the sun.
要是没有太阳的辐射热，地球将会是一个冰冻的球体。
When the sun's rays hit the earth, a lot of the heat is reflected back into space.
太阳光线照射到地球时，大量的热被反射回太空。
They shunned the belief that there is a link between the alignment of the planets and events on the Earth.
他们回避了在行星的排列和地球上发生的事件之间有联系的看法。
Science fiction writers have long dreamed that humans might one day quit the earth to colonize other planets.
科幻小说作家们长期以来一直梦想着人类有一天可以离开地球移居到其它星球上。
If it had hit the Earth, it would have made a crater 100 miles across and thrown up an immense cloud of dust.
如果它撞上了地球，就会砸出一个100英里宽的大坑并扬起巨大的尘埃云团。
The Earth Day was created to remind people to care about the earth.
设立地球日是为了提醒人们要关心地球。
地球变得太热了。
地球是我们的家园。
These satellites fly around the earth.
这些卫星绕地球飞行。
Without trees, many animals can not live on the earth. It's not easy for man to live on the earth, either.
没有树木，许多动物不能在地球上生活，人类在地球上生活也不容易。
Nobody can play a role in protecting the earth.
没有人能保护地球。
They help bring air and nutrients to the earth.
它们帮助将空气和营养物质带到地球。
This makes the satellite fall down to the earth.
这使得卫星坠落到地球上。
The Shenzhou XI spaceship returned to the Earth successfully.
神舟十一号飞船成功返回地球。
On the earth, he made friends with a fox.
在地球上，他和一只狐狸交了朋友。
Having your own garden helps the earth as well.
拥有自己的花园也有助于保护地球。
They can "see" houses and schools on the earth.
它们可以“看到”地球上的房子和学校。
Kids enjoy time outdoors while learning about the earth.
孩子们喜欢在户外学习有关地球的知识。
"Living green" is to take responsibility for protecting the earth.
“绿色生活”旨在承担保护地球的责任。
They believe that crocodiles made the earth and its people.
他们认为鳄鱼创造了地球以及它的子民。
To protect the earth, we mustn't throw away waste carelessly.
为了保护地球，我们不能随意丢弃废物。
This force tries to take the satellite away from the earth.
这个力试图把卫星从地球上带走。
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