单词 | 泥盆纪 |
释义 | 〔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〔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〔Devonian〕The Devonian Period or its system of deposits.泥盆纪(系)或泥盆纪(系)的沉积矿系体系〔placoderm〕Any of various extinct fishes of the Silurian and Devonian periods, characterized by bony plates of armor covering the head and flanks, hinged jaws, and paired fins.盾皮鱼:各种现已灭绝的希留利亚纪和泥盆纪鱼类,特征是头部和两侧被多骨的甲壳盖住、有链的颚和成对的鳍〔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〔ostracoderm〕Any of several groups of extinct primitive jawless fishes of the Ordovician through the Devonian periods in North America and Europe, having bodies that were encased in an armor of bony plates.甲胄鱼:生存于奥陶纪到泥盆纪时代北美洲与欧洲,现已绝种的原始无颚鱼类族群,其鱼身被骨板所组成的盔甲包住 |
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