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核心詞議：

速記方法


知識(shí)擴(kuò)展


中文詞源： Permian
精選例句

常見(jiàn)考點(diǎn)例句：

Most rock sequences that straddle the end of the permian are either incomplete or hard to date .

大部分跨越了二疊紀(jì)的巖序列不是不夠完整就是很難確定日期。

The affinity of associated elements in permian coals from the huaibei coalfield .

淮北煤田二疊紀(jì)煤中伴生元素的親和性研究。

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 .

大約25千萬(wàn)年前，也就是所說(shuō)的二疊紀(jì)的末端時(shí)候，經(jīng)過(guò)一系列火山劇烈噴發(fā)和毀滅性全球升溫，生命幾乎消失殆盡。

When grasby and his team analyzed rocks from just before the permian mass extinction , they noticed unusual microscopic particles .

當(dāng)grasby和他的團(tuán)隊(duì)分析了“二疊紀(jì)滅絕”前的巖石成分后，他們注意到一些不尋常的微觀顆粒。

Dimetrodon appeared in the late paleozoic era , during the permian period , long before the dinosaurs evolved .

異齒龍出現(xiàn)于晚古生代，在二疊紀(jì)時(shí)期，早在恐龍進(jìn)化而來(lái)的。