oligocene 

  1. 形容詞
漸新世的
漸新統的

    
                        
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    名詞
不可數名詞:
漸新世, 漸新統

    

    
                        
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例句

                

                    
    
                                                    
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                                In the Oligocene , global cooling started.                            
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  2. 
                                Their numbers peaked during the Oligocene .                            
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                                From the Oligocene there is some conglomerate.                            
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  4. 
                                Oligocene formations are seen in Kutch and Assam.                            
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                                The first true tapirs appeared in the Oligocene .                            
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