文字稿//Robots Find Salt Water on Mars
What does "environment" mean?
Go outside. Look around. Lie on the grass. Look at the sky.
Our environment is the natural things around us. It is the air, plants,
animals, the clouds in the sky…
The Earth's environment keeps us alive. We have air to breathe. We have water
to drink and food to eat.
But our planet has 8 billion people! It needs help.
We can help. But can another planet help too? Can people live there one day?
Hmmm...which planet? Some planets are too hot or too cold. Some are okay. But
do they have water?
The planet Mars is not too hot or too cold. Scientists are learning more
about its environment. They sent robots to look around.
Guess what one robot found?! Salt water! Mars had salt water a long time ago.
Maybe Mars has water now!
Can people live on Mars one day? Scientists need to find out more. For now,
let's help our environment here on Earth!
1. sky 天空
Hey, you're back! 你回來了！
How's Hehuanshan? 合歡山如何啊？
It was great! The air was fresh and the sky seemed bigger.
2. cloud 雲
There were no clouds at night so we watched the stars.
That's wonderful! 太棒了！
3. grass 草地
So you just laid on the ground outside? 所以你們就躺在外面地上？
Yeah, we laid on the grass until midnight. 對，躺在草地上到半夜。
4. long time ago 很久以前
I love stargazing. 我喜歡觀星。
I saw many shooting stars on Taipingshan a long time ago.
long time ago 很久以前
1. What does the Earth's environment do?
A: Makes us special
B: Keeps us alive
C: Learns about Mars
2. What did scientists send to Mars?
3. What did Mars have a long time ago?
B: Salt water