But evidence is accumulating that the biggest extinction of all, 252.3m years back, at the end of the Permian period, was indeed also triggered by an impact.
不过有证据不断地证明发生在2亿5230万年前二叠纪时期的那次大灭绝也是因为陨石坠落而造成的。
单词 | permian period |
释义 |
permian period
英汉-汉英词典
二叠纪 Permian period二迭纪
词组 | 习惯用语
您要查找的是不是:perminal period 胚种期 The Permian Period 二叠纪 later permian period 晚二叠世 lower permian period 下二叠纪 permian to triassic period 二叠三叠纪 carboniferous period permian period 石炭 the later permian period 晚二叠世 permian period 二叠纪
原声例句
经济学人-科技 But evidence is accumulating that the biggest extinction of all, 252.3m years back, at the end of the Permian period, was indeed also triggered by an impact. 不过有证据不断地证明发生在2亿5230万年前二叠纪时期的那次大灭绝也是因为陨石坠落而造成的。
中文百科
二叠纪 Permian(重定向自Permian Period)
二叠纪(Permian)是约2.9~2.5亿年前古生代的最后一个地质时代,在石炭纪、三叠纪之间。定义二叠纪的岩石层是比较分明的,但开始、结束的精确年代却有争议。其不精确度可达数百万年。以往,二叠纪为二分,目前二叠纪使用三分法:Cisuralian、Guadalupian、乐平世(Lopingian)。Permian源自俄罗斯的彼尔姆州。中文译为二叠纪一说是在德国的同年代地层的上层是镁质灰岩,下层是红色砂岩之故。
英语百科
Permian 二叠纪(重定向自Permian Period)
![]() ![]() ![]() The Permian is a geologic period and system which extends from 298.9 to 252.17 million years ago. It is the last period of the Paleozoic, following the Carboniferous and preceding the Triassic of the Mesozoic. The concept of the Permian was introduced in 1841 by geologist Sir Roderick Murchison, who named it after the ancient kingdom of Permia.
近义、反义、联想词
近义词n.period, geological period
英英词典
permian period n.
synonymous: Permian |
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