使用生物学事件来测量地质学时间。
Biochronology The measurement of geological time using biological events.
地质记录显示这一事件引发了恐龙的迅速死亡，摧毁了海洋生物和陆地生态系统，唯有星状冲击是这一切的合理解释。
Geological records show the event that triggered the dinosaurs' demise rapidly destroyed Marine and land ecosystems, and the asteroid hit is the only plausible explanation for this.
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