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B1 中级 英语 3:41 Educational

Mars 101 | National Geographic

National Geographic · 4,574,897 次观看 · 添加于 3 周前

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[Music]

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to the ancient romans the planet mars

00:07

was symbolic of blood

00:10

and war

00:12

but to many people today

00:14

the red planet may hold the key

00:17

for a bright new future for humanity

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[Music]

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the story of mars began about 4.5

00:27

billion years ago when gas and dust

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swirl together to form the fourth planet

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from the sun

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mars is the second smallest planet in

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the solar system with a diameter just

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shy of the width of africa

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in fact its entire surface area is

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