評論
打印
Satellites
人造衛星
Do you know what a satellite is?
你知道什么是人造衛星嗎？
It is an object made by humans.
它是人類制造的產物。
Like the moon, it circles around the Earth.
就像月球一樣，它圍繞地球旋轉。
How many satellites are there around the Earth?
圍繞地球旋轉的人造衛星有多少顆？
There are over 5000 satellites.
5000多顆。
What do they do in the sky?
它們在天上有什么作用？
They observed the Earth for many different purposes.
它們觀測地球，有不同的用途。
Military satellites watch enemies, non-military satellite watch road conditions, weather changes and so on.
軍事人造衛星用于監視敵人，非軍事人造衛星用于監視路況，天氣變化等等。
Are there any humans inside the satellite?
人造衛星里有人嗎？
No, they're only machines inside satellite.
沒有，里面只有機器。
The first satellite in the world was Sputnik, and it was only the size of a soccer ball.
世界上第一顆人造衛星叫斯帕特尼克，它只有足球大小。
