time n.时间；时代；时期；倍；次数；节拍v.为…安排时间；计时；[体]在某一时刻击球adj.时间的；定时的；分期（付款）的；定期的
详细释义
Noun:
the time of the physical formation and development of the earth (especially prior to human history)
双语例句
The quaternary period of geologic time extends from the end of the tertiary period to the present. 地质时期中的第四纪是从第三纪一直到现在。
Although magnetic reversals have occurred many times in the geologic past, it is not yet possible to predict when the next reversal will occur. 尽管在过去地质时期地磁场发生了多次倒转，但要预测下次倒转将在何时发生也还是不可能的。
