第325篇11-21

第325篇11-21

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Volcanoes
There are thousands of volcanoes all over the world. They hiss and boil, and sometimes they explode.
Volcanoes are a force of nature, both beautiful and dangerous. They can be found on land and on the ocean floor as well.
The country with the most volcanoes is Indonesia. The Pacific Ocean is surrounded by many volcanoes. People call it the “ring of fire".
When a volcano erupts, gas and molten rock shoot out of the top. This can be very dangerous.
Most of the time, a volcano is a mountain. This is be- cause, when it erupts, rock and ash are left behind.
That's why volcanoes usually grow taller each time they erupt.
Some volcanoes are active and others are asleep.
Volcanoes are very powerful and dangerous. But from a safe distance, they can also be very beautiful.
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