英语释义

• of or relating to the Cretaceous geologic era;

  "cretaceous rocks"

• abounding in chalk

片语

cretaceous granites白垩纪花岗巖

Cretaceous Reservoirs陆东

Late Cretaceous晚白垩世

Cretaceous ResearchCretaceous Research is a bimonthly peer-reviewed scientific journal published by Elsevier. The journal focuses on topics dealing with the Cretaceous period and the Cretaceous–Paleogene boundary.

low cretaceous下白垩统

Cretaceous Coniacian白垩系康尼亚克阶

Cretaceous World白垩纪世界

cretaceous period白垩纪

cretaceous Cret白垩系

英汉例句

• Some 65.5m years ago, at the end of the Cretaceous period, the Earth collided with an asteroid and the biggest terrestrial beasts in history were no more.

  大约在6550万年以前，也就是在白垩纪末期，地球与一颗小行星发生碰撞，此后这种史上陆地最大的动物便由此绝迹了。

• Niedzwiedzki and Singer「s discovery was reported in the journal Cretaceous Research.

  尼德韦德兹克和司辛格的发现在杂志《白垩纪研究》上面发表了。

• This 65.5-million-year-old layer of Earth separates fossils of the Cretaceous period from those of the Tertiary period.

  这个有着6550万年历史的地层分离了白垩纪的化石和第三纪的化石。

• The most studied mass extinction, between the Cretaceous and Paleogene periods about 65 million years ago, killed off the dinosaurs and made room for mammals to rapidly diversify and evolve.

  研究最多的物种大规模灭绝，是发生在白垩纪与第三纪的两个阶段之间，约6500万年前的时期，这时恐龙消灭了，它让出位置供哺乳类动物迅速地扩大品种和进化。

• Not exactly outer space then, or the Cretaceous period.

  而并不是外太空或是白垩纪。

• One hundred and twenty million years ago, when a Cretaceous sea covered what is now South Australia, an ichthyosaur had a really bad day.

  一亿两千万年前，白垩纪的海洋覆盖着现在的澳大利亚南部，一条鱼龙（注：一种类似鱼和海豚的大型海栖爬行动物）经历了十分糟糕的一天。

• One was an isolated feather dating from the Cretaceous period (about 100m years ago) that was found in Brazil.

  其中一个是在巴西发现的白垩纪（约1亿年前）的一根羽毛。

• Scientists believe that during the Cretaceous period, a spate of volcanic activity caused plant life to bloom on the surface of the oceans.

  科学家认为，在白垩纪，一连串的火山活动导致植物在海平面生长旺盛。

• The discovery confirms 「that big birds were living alongside Cretaceous non-avian dinosaurs,」 lead author Darren Naish said.

  这个发现对《白垩纪时期同时存在着大型鸟类和非鸟类恐龙》进行了证实。

• This story, though, raises the question of why there is but a single ejecta layer of iridium and shocked quartz in late Cretaceous rocks around the world.

  然而，查特基博士的说法引发了疑问：为什么全球白垩纪晚期巖石中含有沖击石英和铱的喷发物地层只有一层？ 答案或许是，两次撞击是在同时发生的。

• In fact, these big birds fit into the idea that the Cretaceous wasn」t 「a non-avian dinosaurs-only theme park.」

  主要作者DarrenNaish表示：「事实上，这些大鸟们的存在符合白垩纪并非仅存在着非鸟类恐龙这一观点。」

• An extraterrestrial impact is most closely linked to the Cretaceous extinction event.

  天外来客对地球的撞击与白垩纪的物种灭绝事件有着最为密切的联系。

• Its discovery pushes back the date of when flowering plants diversified to around 127 million years ago, during the early Cretaceous period.

  这项发现将开花植物开始多样化的时间推到了大约一亿两千七百万年前，那时正是白垩纪的早期。

• Though the Cretaceous asteroid cleared the stage, mammals did not really get going until 10m years later, in the Eocene epoch.

  尽管白垩纪时小行星撞击地球后为哺乳动物搭起了活动的舞台，但是哺乳动物真正大行其道是100万年以后的事情了，也就是在始新世时期。

• In his view, the hosts on which lice were speciating during the Cretaceous could have been a different branch of the mammalian family tree, all of whose species are extinct.

  在他看来，在白垩纪虱子物种进化时的宿主可能是哺乳动物系统树上的另一分支而这一分支上的所有物种都灭绝了。

• Other bird 「trace」 fossils have been found in Utah and Alaska, but none from so far back as the early Cretaceous -- at the height of the age of dinosaurs.

  在犹他州和阿拉斯加州还发现了另一种鸟的「足迹」化石，但都无法追溯到白垩纪早期——恐龙时代的鼎盛时期。

• They date from the early Cretaceous period, which began around 145 million years ago and ended 65 million years ago.

  据悉，他们最早生活在白垩纪早期，亦即1亿4千5百万年前到6千5百万年前。