W: I think living on Mars would be interesting.

M: I don't think so. It would be boring. We could not go outside or do outdoor sports.

W: I know it's very cold on Mars, but we could stay inside because everyone could live in very big houses.

M: Where would we get water? There is no water on Mars.

W: We could melt ice to make water. I think living on Mars would be an adventure.

M: But robots do all the work for people. Then I needn't go outside. What would you do all day?

W: I would write a book about life on Mars, you wouldn't sell the book to the people on the Earth and become very rich and famous.

M: That's a good idea. I think lots of people would buy a book like that.

女士：我认为住在火星上会很有趣。

男士：我不这么认为，那会很无聊，我们不能出去或做户外运动。

女士：我知道火星上很冷，但我们可以待在室内，因为每个人都可以住在非常大的房子里。

男士：我们从哪里取水？火星上没有水。

女士：我们可以融化冰来制造水，我认为住在火星上会是一次冒险。

男士：但机器人会为人们做所有的工作，那我就不需要出去了，你一整天会做什么？

女士：我会写一本关于火星生活的书，然后把书卖给地球上的人，变得非常富有和有名。

男士：这是个好主意，我认为很多人会买这样的书。

Is there any life on Mars? We don't know. We're sure that people on the Earth are not able to live on Mars. People need oxygen to breathe. There is almost no oxygen on Mars.

Living on Mars would be like living on a very high mountain. There would be little air. The temperature might be 50 degrees above zero at noon and 140 degrees below zero at night. Many people think there may be plants on Mars. But scientists are not sure about it.

Will humans go to Mars one day? If they do, they must take enough oxygen, food and clothing with them.

火星上有生命吗？我们不知道。我们确定地球上的人类无法在火星上生存，人类需要氧气来呼吸，火星上几乎没有氧气。

在火星上生活就像在非常高的山上生活，空气会很稀薄。中午的温度可能在零上50度，晚上则在零下140度。许多人认为火星上可能有植物，但科学家对此并不确定。

人类有一天会去火星吗？如果去的话，他们必须带上足够的氧气、食物和衣物。