The earth is our only home, we should protect it perfectly.

地球是我们的唯一家园，我们要好好保护它。

youdao

The earth is our only home, let us hand in hand, together to protect it!

地球是我们唯一的家园，让我们携手，一起来保护它！

youdao

We have only one earth, the earth is our only home, any damage the earth's behavior in harm humans.

我们只有一个地球，地球是我们唯一的家，任何破坏地球的行为都是在伤害人类自己。

youdao

Mars is more like Earth than any other place in the known universe, and while astronomers now believe there may be millions of earth-like planets in our galaxy, Mars is the only one that is within reach.

FORBES: Saving NASA From The Obama Science Fair