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Seventy million years after the great melt,
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Seventy million years after the great melt, 大融化7000万年之后

Seventy percent of the world's population lives on coastal plains.
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Seventy percent of the world's population lives on coastal plains. 世界上70%的人口居住在滨海平原

Seventy percent of this gas,
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Seventy percent of this gas, 没有氧气我们的非就不能呼吸

another seventy times
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another seventy times 重复70次

and temperatures drop to minus seventy degrees centigrade.
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and temperatures drop to minus seventy degrees centigrade. 气温下降到零下70℃

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