San Francisco earthquake was one of the worst catastrophes of the century.

旧金山地震是世纪性的灾难之一。

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The San Francisco earthquake was one of the worst catastrophes of the century.

旧金山地震是世纪性的灾难之一。

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San Francisco is in an earthquake zone.

旧金山在一个地震带上。

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San Francisco is in an earthquake zone.

旧金山在一个地震带上。

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