核心词议：
Permian 基本解释
n.& adj. 二叠纪（的）
速记方法
知识扩展
中文词源
中文词源： Permian
精选例句
常见考点例句：
- Most rock sequences that straddle the end of the permian are either incomplete or hard to date .
- 大部分跨越了二叠纪的岩序列不是不够完整就是很难确定日期。
- The affinity of associated elements in permian coals from the huaibei coalfield .
- 淮北煤田二叠纪煤中伴生元素的亲和性研究。
- Some 250 million years ago , at the end of the time known as the permian , life was all but wiped out during a sustained period of massive volcanic eruption and devastating global warming .
- 大约25千万年前，也就是所说的二叠纪的末端时候，经过一系列火山剧烈喷发和毁灭性全球升温，生命几乎消失殆尽。
- When grasby and his team analyzed rocks from just before the permian mass extinction , they noticed unusual microscopic particles .
- 当grasby和他的团队分析了“二叠纪灭绝”前的岩石成分后，他们注意到一些不寻常的微观颗粒。
- Dimetrodon appeared in the late paleozoic era , during the permian period , long before the dinosaurs evolved .
- 异齿龙出现于晚古生代，在二叠纪时期，早在恐龙进化而来的。
