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- All living things contain radiocarbon. 所有生物都含有放射性碳。
- Researchers use radiocarbon to study certain biological processes. 研究人员借助放射性碳来研究某些生物过程。
- The material in this beach has been dated by radiocarbon. 这个海滩上的物质经过放射性碳测定。
- The leaf was allowed to photosynthesize in the presence of radiocarbon. 叶子被允许同放射性碳进行光合作用。
- Basics of carbonate sequence stratigraphy are outlined. 概述碳酸岩层序地层学基础。
- Professional papers of petroleum stratigraphy and palaeontology II. 石油地层古生物会议论文集2。
- Sedimentation Models and Quantitative Stratigraphy II. 沉积模型和定量地层学2。
- Stratigraphy studies the sequence of the rocks in the earth's crust. 地层学研究地壳中岩石的层序。
- Radiocarbon dating in 1988 showed the cloth was made between 1260 and 1390. 放射性碳年代测定法显示,那块布料产于1260年与1390年之间。
- Radiocarbon dating showed some of them to be more than 14,000 years old. 根据碳同位素测定,这些化石距今已有一万四千年。
- From the view of stratigraphy, they all belong to the Cretaceous period. 从地层学上看,它们都属于白垩纪。
- Their main effort is directed to stratigraphy and structure of outcrops. 他们的主要精力放在研究天然露头的地层情况与构造上。
- Late Quaternary stratigraphy and evolution of the Changjiang Delta, China. 晚第四纪古河口湾的发育及有关的资源环境问题。
- From the view of stratigraphy, they all belong to the Cretaceous period . 从地层学上看,它们都属于白垩纪。
- Stratigraphy is one of the basic subjects of most significance in geology. 地层学是地质学的一门重要的基础学科。
- Bacteria and bacterial residue carry additional carbon and would skew the radiocarbon date toward the present. 细菌和细菌性残余带来额外的碳,会使现时测定的年代变得不准确。
- Seismic stratigraphy is the study of stratigraphy and depositional facies as interpreted from seismic data. 地震地层学是按照地震资料解释进行地层学和沉积相的研究。
- Coal geology emphatically studies always stratigraphy and sedimentology of coal and coal-bearing strata. 煤地质学一直偏重于对煤和含煤地层的地层学和沉积学的研究。
- The researchers used radiocarbon dating on 22 pieces of microscopic charcoal found among Neandertal tools in fire pits in Gorham Cave. 研究者们使用放射性碳方法为在山洞中发现的22片木炭确定年代.
- American chemist.He won a1960Nobel Prize for developing the method of radiocarbon dating. 利比,威拉德·弗兰克1908-1980美国化学家,因研制出放射性碳测年代技术而获得1960年诺贝尔奖