You're aboard spaceship Earth

You're aboard spaceship Earth

你在地球飞船上

The shuttle is blasting off into space.

航天飞机正在向太空发射。

The shuttle carries a crew of six. For a week the shuttle will be their home in space. On board they have all the things they need to stay alive and healthy. They have food. They have water. And they have oxygen. Oxygen is the gas that our bodies take from air when we breathe. Once they are in space, the crew cannot stop somewhere for a snack and a cold drink. They cannot open the windows for some fresh air. They cannot get more of anything. Whatever they need must be on board. off into space.

这架航天飞机载有6名机组人员。在一周的时间里，航天飞机将是他们在太空中的家。他们在船上有维持生命和健康所需的一切。 他们有食物。他们有水。它们有氧。 氧气是我们呼吸时身体从空气中吸收的气体。 一旦进入太空，宇航员就不能在某个地方停下来吃点零食或喝点冷饮。他们不能打开窗户呼吸新鲜空气。他们不能得到更多的东西。 他们需要的东西肯定在船上。飞向太空。

Someday you may rocket into space. But right now you are aboard a different spaceship. You have been aboard it all your life. This spaceship's name is Earth. Earth is your home in space. It is home for every person in the world. We are all aboard the same spaceship. Earth is one of nine planets that travel around the sun. Every day Earth travels 1, 608, 000 miles through space. It whizzes along at 67, 000 miles an hour. Because we are aboard Earth, we too are whizzing through space.

有一天你可能会飞上太空。但现在你在另一艘宇宙飞船上。你一辈子都在船上。这艘宇宙飞船的名字是地球。 地球是你在太空中的家。它是世界上每一个人的家。我们都在同一艘宇宙飞船上。 地球是围绕太阳运行的九大行星之一。地球每天在太空中行进160万8千英里。它以每小时67000英里的速度飞驰。因为我们在地球上，我们也在太空中飞驰。

Like the shuttle crew, we can't make stops. We can't get more of anything. But Spaceship Earth has everything we need to stay alive. It has food. It has air with oxygen. It has water. Earth has had the same water for billions of years. Plants, animals, and people all use it. Yet Earth doesn't run out of water, because the same water is used over and over again--it is recycled.

就像航天飞机的工作人员一样，我们不能停下来。我们不能得到更多的东西。但是地球飞船有我们生存所需的一切。它有食物。它有含氧空气。它有水。 几十亿年来，地球上一直有同样的水。植物、动物和人类都使用它。然而，地球上的水并不会耗尽，因为同样的水会被反复使用——它会被循环利用。

Most of our water comes from the oceans. Water is drawn into the air by the sun's heat. It becomes a gas called water vapor. Salt from the ocean water is left behind. Water vapor forms clouds. Rain clouds drop their water on the earth. Some of it falls in the oceans. Some falls on land. There much of the rainwater runs off into streams. The streams flow into rivers. And the rivers flow back into the oceans. Again the sun's heat draws water out of the oceans. Water vapor forms clouds. It falls again as rain.

我们大部分的水来自海洋。水被太阳的热量吸收到空气中。它变成了一种叫做水蒸气的气体。海水中的盐被留下了。 水蒸气形成云。雨云把水滴在地上。其中一些流入了海洋。有些落在陆地上。 在那里，许多雨水流入溪流。小溪流入江河。河流又流回海洋。 太阳的热量再次从海洋中吸收水分。水蒸气形成云。它又以雨的形式落下。