清河镇动物群的存在说明我国北部地槽区早古生代早期的一次重大生物事件。
The discovery of the Qinghezhen fauna shows that during the Early Palaeozoic there occurred a significant event in the North China geosyncline.
清河镇动物群的存在说明我国北部地槽区早古生代早期的一次重大生物事件。
The discovery of the Qinghezhen fauna shows that during the Early Palaeozoic there occurred a significant event in the North China geosyncline.
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