-
These rocks have been dated radiometrically at two billion years old.
经辐射能探测，这些岩石形成于20亿年前。
《牛津词典》
-
The Lubaka tuff does not contain minerals that can be dated radiometrically.
路贝卡凝灰岩并不包含能通过放射性来确定年代的矿物质。
youdao
-
The Lubaka tuff does not contain minerals that can be dated radiometrically.
路贝卡凝灰岩并不包含能通过放射性来确定年代的矿物质。
youdao