1·One day, a UFO come to the earth.
有一天，一个外星飞碟来到了地球。
2·Did you come to the organic food festival we had to celebrate Earth Day?
你来参加我们为庆祝地球日而举办的有机食品节了吗？
3·For us common people on the earth, the dream of travelling around space will come true.
对于我们这些地球上的普通人，去太空旅行的梦想会成真。
4·Occasionally you come back to earth.
偶尔你会回到地面上。
5·Some have vanished from the face of the earth, others are dying slowly, but all have undergone changes as they have come into contact with an expanding machine civilization.
一些已经从地球表面消失了，其他的正在慢慢地死亡，但所有的都经历了变化，因为它们已经接触到一个不断扩张的机器文明。
6·Solar storms aimed at Earth come in three stages, not all of which occur in any given storm.
扑向地球的太阳风暴分三个阶段，但并不是所有的阶段都发生在特定的风暴中。
7·If we don't look after our earth carefully, the day will come when flowers will only be able to grow on the moon.
如果我们不仔细照顾我们的地球，总有一天，花将只能在月球上生长。
8·If we acknowledge that human manipulation of the Earth has been a destructive force, we can also imagine that human endeavours can help us build a less destructive world in the centuries to come.
如果我们承认人类对地球的操纵是一种破坏，我们也可以认为，人类的努力可以帮助我们在未来几个世纪建立一个破坏性较小的世界。
9·Spring returns to the earth.; Spring has come (round).
大地回春。
—— 《新英汉大辞典》
10·Robots and "fabricators" may enable large construction projects, using raw materials that need not come from Earth.
通过就地取用不必从地球运来的原料，机器人和“制造者”也许能帮助展开大型建筑项目。