absolute age of groundwater的用法和样例：
- One way to tell whether the lunar cataclysm actually occurred would be to determine the absolute age of the SPA basin.
- The determination of the absolute age of rocks,minerals and fossils, in years before the present, is the basis for the field of geochronology.
- Scientists, however, know the absolute ages of only the basins that were visited by the Apollo and Luna missions.
- The average age of the boys in this class is fifteen.
- I don't think he looks his age of seventy.