paleozoic era

P 开头单词

常见例句

Cambrian The earliest period of the Paleozoic era, about 590-510 million years ago.
寒武纪:地质年代古生代的第一个纪，在五亿九千万到五亿一千万前。
Of,belonging to,or designating the geologic time,system of rocks,and sedimentary deposits of the seventh and last period of the Paleozoic Era.
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。
Cambrian: the beginning of the Paleozoic Era Animals with hard-shells appeared in great numbers for the first time during the Cambrian.
寒武纪：古生代的开始（距今5亿1,400万年前），具有硬壳的生物在寒武纪第一次大量出现。
Of, belonging to, or designating the geologic time, system of rocks, and sedimentary deposits of the seventh and last period of the Paleozoic Era.
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
The major structure in the area is the NE-NNE folded belt consisting of Banxi Group of the Middle Proterozoic era to the Ordovician system of the Early Paleozoic era.
由新元古界板溪群至下古生界奥陶系所构成的NE-NNE向褶皱带为区内主体构造；
Of, relating to, or designating the geologic time, system of rocks, and sedimentary deposits of the second period of the Paleozoic Era, characterized by the appearance of primitive fishes.
奥陶纪（系）的属于、有关或指奥陶纪（系）的，奥陶纪（系）是指古生代第二纪的一段地质时间、岩石系统及沉积物，该纪以早期鱼的出现为特征

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