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conodonts 英kənɒ'dɒnts美kənɒ'dɒnts BNC⁶¹⁷²⁷
基本英英例句
牙形化石¹⁰⁰原型conodont的三单
名词 conodont:
the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodontasmall 2 inches long extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes The study of the internal structure of conodonts facilitates the differentiation among primitive euconodonts as well as part of paraconodonts more correctly.
基于内部构造的观察，对原始真牙形石及部分易混淆的副牙形石进行正确的分类。 geojournals
Besides, the colour alteration of conodonts and its significance in exploring oil and gas is also discussed.
本文还讨论了该区牙形刺颜色变化对油气勘探的意义。 cnki
Coal measures of Middle and Upper Carboniferous in North China contain abundant conodonts, but their occurrence at various localities is different.
华北中、晚石炭世含煤地层中含有丰富的牙形石，但各地产出情形不一。 cnki
Late Tournaisian conodonts from the Jiehejie Formation in the Qinling Mountains, situated between the North China Platform and South China Platform are first described and illustrated in this paper.
首次描述并图示了位于华北地台和华南地台之间的秦岭山脉中的早石炭世杜内阶上部的牙形刺。 dictall
The Precordilleran conodonts are mainly related to a calm and warm- water ocean.
牙形刺的分布主要与平静的暖水大洋有关。 cnki
The animals, called conodonts, possessed rows of sharp, interlocking cone-shaped teeth that raked prey into their mouths.
这种叫作牙形刺的动物长有数排相互咬合的圆锥状利牙，像钉耙一样将猎物“耙”入口中。 yeeyan
They first shared space with trilobites, sea scorpions and other animals that went extinct long before conodonts did.
它们一开始和三叶虫、广鳍类动物以及其他在它们灭绝之前很早就已经灭绝了的动物生活在同一片空间。 yeeyan
Conodonts went extinct at the end of the Triassic Period, about the time dinosaurs were evolving.
牙形刺在三叠纪末期灭绝了，这正是恐龙开始演化的时代。 yeeyan
Conodonts lived in the Cambrian seas, and may have eaten certain types of plankton, but no one knows for sure.
牙形刺生活在寒武纪的海洋中，可能以某种浮游生物为食，不过没人清楚具体情况。 yeeyan |