The land resources map is a graphic record of a comprehensive appraisal of land resources.

土地资源图是土地资源综合评价的图形记录。

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Though a limited number of stratigraphic evidences discovered, the discovery of the evidences for impacts in the strati-graphic record has developed an important research area of NEO impacts.

虽然目前只发现了为数很少的证据，但是在地层记录里发现撞击证据已经形成小天体撞击研究的一个重要领域。

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