| 单词 | 地质年代 |
| 释义 | 〔Phanerozoic〕Of or relating to the geologic time period from approximately 570 million years ago to the present, comprising the Paleozoic, Mesozoic, and Cenozoic eras, and marked by an abundance of fossil evidence of life, especially higher forms, in the corresponding rocks.显生元的：约从5亿7千万年前至今的地质年代的或与其相关的，包含了古生代、中生代与新生代，以其丰富的生物化石著称，尤其是高等生物化石〔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〔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〔Triassic〕The Triassic Period or its system of deposits.三叠纪，三叠系：地质年代中的三叠纪或沉积矿床的系〔Oligocene〕Of, relating to, or being the geologic time and deposits of the epoch in the Tertiary Period of the Cenozoic Era that extended from the Eocene Epoch to the Miocene Epoch. See table at geologic time 渐新世的：新生代第三纪的，从始新世到中新世的地质年代的或沉积物的或与之相关的 参见 geologic time〔Mississippian〕Of, belonging to, or being the geologic time, system of rocks, and sedimentary deposits of the fifth period of the Paleozoic Era, characterized by the submergence of extensive land areas under shallow seas. See table at geologic time 密西西比的：属于或处于古生代第五世的地质年代的、或该年代的岩石系统的或沉积物的，这一地质时代以大量陆地沉入浅海为特征 参见 geologic time〔Precambrian〕Of, belonging to, or being the oldest and largest division of geologic time, preceding the Cambrian Period, often subdivided into the Archeozoic and Proterozoic eras, and characterized by the appearance of primitive forms of life. See table at geologic time 前寒武纪的：地质年代中最古老和最大的阶段的、属于这一阶段的或处于这一阶段的，其前为寒武纪期，寒武纪期又可细分为始生代和原生代，特征为原始生命形式的出现 参见 geologic time〔geochronology〕The chronology of the earth's history as determined by geologic events.地质年代学：以地质事件测定的地质历史年代学 |
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