| 单词 | geologic time |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔eon〕The longest division of geologic time, containing two or more eras.万古：地质时期中最长的分段，包括两个或两个以上的代美国传统〔epoch〕A unit of geologic time that is a division of a period.世：地理学中小于纪的时间单位美国传统〔era〕The longest division of geologic time, made up of one or more periods.纪元：地质年代最长的划分，由一个或多个阶段组成美国传统〔fossil fuel〕A hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from living matter of a previous geologic time and used for fuel.矿物燃料：碳氢化合物的沉淀，如石油、煤、天然气等，由古代生物衍生而成，经过开发后用作燃料美国传统〔geochronometry〕Measurement of geologic time, as through isotopic radioactive decay.地质年代测定：通过放射性同位素衰变来测定地质年代美国传统〔macroevolution〕Large-scale evolution occurring over geologic time that results in the formation of new taxonomic groups.宏观进化：产生新的分类群体形的跨越地质时代的大规模进化美国传统〔paleontology〕The study of the forms of life existing in prehistoric or geologic times, as represented by the fossils of plants, animals, and other organisms.古生物学：对出现在史前或地质时代的生命的形成的研究，体现在植物、动物和其它有机体的化石上美国传统 |
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