问题描述：
英语翻译
Dinosaurs lived on the Earth a long,long time ago.
Some walk on the land,some flew in the air and some swam in lakes.
Some ate meat and some ate plants.
Then they all died.
Why?
Scientists have a lot of ideas.
Here are two of them.
Maybe the Earth became very cold.
Plants all died and water became ice.
There was no food or water for dinosaurs and they died,too.
Maybe a big rock hit the Earth.
Plants and trees died.
The dinosaurs died,too.
what your idea?
Dinosaurs lived on the Earth a long,long time ago.
Some walk on the land,some flew in the air and some swam in lakes.
Some ate meat and some ate plants.
Then they all died.
Why?
Scientists have a lot of ideas.
Here are two of them.
Maybe the Earth became very cold.
Plants all died and water became ice.
There was no food or water for dinosaurs and they died,too.
Maybe a big rock hit the Earth.
Plants and trees died.
The dinosaurs died,too.
what your idea?
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