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- It was originally defined as the era that predated the emergence of life in the Cambrian period. 最初被定义为寒武纪生命出现前的纪元。
- The new framework, comprising a pre-trilobite series and three trilobite-dominated series, reflects the major evolutional stages of the life on Earth during Cambrian Period. 新的划分方案包括1个“前三叶虫统”和3个“三叶虫优势统”,反映了寒武纪生命发展的主要阶段。
- Sedimentation-diagenesis deposits mainly formed during late Sinian to Cambrian period, such as Bingtongshan PbZn deposits and Aozigang deposits. 沉积成岩型铅锌矿主要成矿时代属晚震旦世~寒武纪,如冰洞山式铅锌矿床和凹子岗锌矿床。
- The area we debated is in infraneritic environment at the Meishucunian Age,early Cambrian Period,when deposited a suit of carbonate and phosphate. 川西南滇东地区在早寒武世梅树村期处于上扬子浅海环境,沉积一套浅海碳酸盐和磷酸盐。
- The low angular step shape thrusts BD4DF、BD4D1F were formed during middle Cambrian period to Devonian period and have been activated again since Palaeogene period. 该构造中的低角度坡坪式逆断层BD4DF、BD4D1F形成于中寒武世-泥盆纪,自古近纪开始又发生活动。
- Starting from the Cambrian Period (530 MYA) and ending at the Early Triassic Period (248 MYA), Walking With Monsters shows the life and death struggles prehistoric creatures before the dinosaurs went through. 本片介绍了在这段时期内的各种史前生物的生死搏斗,同时也描绘了我们人类最早祖先的真实模样。
- 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. 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
- Follow-up studies using the molecular clock produced estimates for this split that varied significantly, ranging from as old as one billion years ago to as young as just before the Cambrian period. 后来使用分子时钟来估算分支时间的研究结果,差异都很大,可能早至10亿年前,晚至寒武纪即将开始时。
- Online access to the museum's catalogues is provided including databases for fossils, the Cambrian period, the Ordovician period, rock specimens, and the MacCulloch database of geological specimens. 还有一些岩石标本及地质学标本。
- That period was a bright page in the history of Chinese literature. 那个时期是中国文学史上光辉的一页。
- Let us hope that the period of this injustice will be over soon. 让我们希望这个不公正的时期很快结束吧。
- Palaeogeography of Early Cambrian Period in Hui- Wei- Qi Region, North Henan 豫北辉卫淇地区寒武纪早期古地理
- Palaeogeography of Early Cambrian Period in HuiWeiQi Region, North Henan 豫北辉卫淇地区寒武纪早期古地理
- Childhood is a period of rapid growth. 幼年是生长迅速的时期。
- He consulted the chronicles of the period. 他参考了这一时期的编年史。
- He had to decide within a given period. 他得在一定时间内作出决定。
- She has a detailed knowledge of this period. 她对这段时期的情况了解地相当详细。
- In that period auto sales hit a14-year low. 这时期汽车销售量达到14年来最低水平。
- In this period, unemployment reaches record levels. 这段时间的失业人数又达到了创纪录水平。
- Which period of history are you studying? 你正在学哪一段历史?
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