| 单词 | 二叠纪 |
| 释义 | 〔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〔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〔therapsid〕Any of various reptiles of the order Therapsida of the Permian and Triassic periods, many of which are considered to be direct ancestors of mammals.兽孔类：二叠纪和三迭纪的兽孔类爬行动物中的一种，它们中的许多种被认为是哺乳动物的直接祖先〔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〔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〔eurypterid〕Any of various large, segmented aquatic arthropods of the order Eurypterida that existed from the Ordovician Period to the Permian Period.（古生）板足鲎目的：一种巨大的、有节的，属于板足鲎目的水生节肢动物，生存于奥陶纪到二叠纪时期 |
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