yán / jiū / rén / yuán / zhèng / zài / fēn / xī / yán / xīn / yǐ / pàn / duàn / dì / xià / yán / céng / de / nián / dài研究人员正在分析岩心,以判断地下岩层的年代。Researchers are analyzing the core specimen to determine the age of the underground rock layers.