| 单词 | 寒武纪 |
| 释义 | 〔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〔graptolite〕Any of numerous extinct colonial marine animals chiefly of the orders Dendroidea and Graptoloidea of the late Cambrian to the early Mississippian periods, whose fossil remains are often used to date the rocks of the Silurian and Ordovician ages.笔石动物：许多已绝灭的殖民地海洋生物中的任何一种，主要为寒武纪晚期到密西西比纪早期的树形笔石目及笔石纲的生物， 其化石残存物常用于确定志留纪和奥陶纪岩石的年代〔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〔Cambrian〕Of, relating to, or belonging to the geologic time, system of rocks, and sedimentary deposits of the first period of the Paleozoic Era, characterized by warm seas and desert land areas. See table at geologic time 寒武纪的：寒武纪的、与之相关的或属于它的，即古新世时代第一时期的岩石体系的以及沉积物的，以海洋的温暖和陆地的荒漠为特征 参见 geologic time |
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