What is the kind of Dan Geer ancient city?
丹葛尔是怎样的一座古城？
He is also an earthquake expert with an organization called Geotechnical Extreme Events Reconnaissance, or GEER.
他同时也是一个叫做GEER的组织的一名地震专家。
He is also an earthquake expert with an organization called Geotechnical Extreme Events Reconnaissance, or GEER.
他同时也是一个叫做GEER的组织的一名地震专家。
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