| 单词 | 古生代 |
| 释义 | 〔Paleozoic〕Of, belonging to, or designating the era of geologic time that includes the Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, and Permian periods and is characterized by the appearance of marine invertebrates, primitive fishes, land plants, and primitive reptiles. See table at geologic time 古生代的：地质时代的一个时期的，属于这个时期的或这么称呼的，包括寒武纪、奥陶纪、志留纪、泥盆纪、密西西比纪、宾夕法尼亚纪和二叠纪时期，并且以海洋无脊椎动物、原始鱼类、陆地植物和早期爬行动物的出现为特征 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〔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〔Permian〕Of, belonging to, or designating the geologic time, system of rocks, and sedimentary deposits of the seventh and last period of the Paleozoic Era. See table at geologic time 二叠纪的，二叠岩的：是、属于或标明为古生代第七个和最后一个阶段的地质时期、岩层及沉积矿藏 参见 geologic time〔Triassic〕Of, belonging to, or being the geologic time, system of rocks, and sedimentary deposits of the first period of the Mesozoic Era, after the Permian Period of the Paleozoic Era and before the Jurassic Period of the Mesozoic Era. See table at geologic time 三叠纪的，三叠系的，三叠纪岩石的：属于或关于中生代的第一个时期的，这个时期岩石系的和沉积矿床的，在古生代的二叠纪元后，中生代的侏罗纪之前 参见 geologic time〔Ordovician〕Of, relating to, or designating the geologic time, system of rocks, and sedimentary deposits of the second period of the Paleozoic Era, characterized by the appearance of primitive fishes. See table at geologic time 奥陶纪（系）的：属于、有关或指奥陶纪（系）的，奥陶纪（系）是指古生代第二纪的一段地质时间、岩石系统及沉积物，该纪以早期鱼的出现为特征 参见 geologic time〔Carboniferous〕Of, belonging to, or denoting a geologic division of the Paleozoic Era following the Devonian and preceding the Permian, including the Mississippian Period and the Pennsylvanian Period and characterized, especially in the Pennsylvanian, by swamp formation and deposition of plant remains later hardened into coal.石炭纪的，石炭系的：属于或表示地质上的一个分段，即紧跟着泥盆纪而早于二叠纪的古生代，包括密西西比纪和宾夕法尼亚纪。古生代的特征，尤其在宾夕法尼亚纪的特征为，沼泽的形成以及后来变硬而成为煤的植物遗骸沉积〔Devonian〕Of, belonging to, or designating the geologic time, system of rocks, or sedimentary deposits of the fourth period of the Paleozoic Era, after the Silurian and before the Mississippian or Carboniferous Period, and characterized by the appearance of forests and amphibians. See table at geologic time 泥盆纪的：归入古生代第四纪的地质时期的岩石系统或沉积矿床泥盆纪。处于志留记之后，密西西比纪或石炭纪之前，森林和两栖类的出现是其特征 参见 geologic time〔conodont〕A Paleozoic microfossil usually having a toothlike shape and considered to be the remains of an extinct marine organism.牙形刺：一种古生代微化石，一般有牙状形体，被认为是一种已灭绝海生生物体的残骸 |
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