radioactive dating信息详情
放射性测定年代
dating───v.约会,与(某人)谈恋爱;注明日期,写上日期;确定年代;过时,不流行;使……显老,显出……的年龄大(date的现在分词);adj.介绍婚姻的;n.约会
radiocarbon dating───放射性碳测定年代;碳同位素年龄测定;<正>放射性碳年代测定(法)
dating from───从什么时候开始
radioactive decay───[核]放射性衰变;放射衰变
chronometric dating───计时测年
dating day───约会日
dating services───约会服务
dating back───[经] 提前填日期
dating service───约会服务
Most famously, uranium-238 decays into lead-206 with a half life of 4.5 billion years, though radioactive rubidium and samarium are also useful for dating things billions of years old.───最为有名的就是铀- 238衰变为铅- 206的半衰期为45亿年,当然放射性铷和钐也同样对测算几十亿年前的物体的年龄很有用。
lived around 125 million years ago, based on the dating of radioactive elements in the sediments that encased the fossil.───通过对包裹化石的沉积层进行放射性元素年代测定,推断出中华龙鸟生活在1.25亿年前。
The potassium-argon radioactive dating method shows the crater was created within a gnat's whisker of the extinction.───钾氩辐射断代法结果显示,这个陨石坑导致了恐龙的瞬间灭绝。