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The Big Bang
宇宙大爆炸
Do you know about the Big Bang?
你了解宇宙大爆炸嗎？
The Big Bang was the beginning of the universe.
宇宙大爆炸是宇宙的開端。
The Big Bang happened at least 13.73 billion years ago.
它至少發生在一百三十七億三千萬年前。
Scientists believe that the older stars are 13.73 billion years old.
科學家相信古老的星球都有一百三十七億三千萬歲了。
And they think that the stars were born immediately after the Big Bang.
他們認為大爆炸之后星球就立即產生了。
Before the Big Bang, there was a small universe.
在大爆炸之前有一個小宇宙。
Then the Big Bang created a huge amount of energy into the universe.
大爆炸創造了大量能量注入到宇宙中。
So the universe became bigger and bigger.
所以，宇宙變得越來越廣闊。
In fact, the universe is still growing.
事實上，宇宙仍在增大。
Nobody knows what made the universe, but now we know that the Big Bang made it large.
沒有人知道什么創造了宇宙，但我們現在知道大爆炸使它變大了。
