cretaceous period

基本解釋

• 白堊紀

同根派生

• cretaceous period相關(guān)詞

英漢例句

雙語例句

• The prints are believed to have been made during the Cretaceous period of the Mesozoic Era, Kim said in a statement.
  這些足跡被認爲是在中生代白堊紀時期由儅時鳥類畱下的。
• The temperature drop during the Cretaceous period would almost certainly have wiped out an 'abundance' of the world's dinosaurs.
  曾經(jīng)稱霸地球顯赫一時的恐龍，在白堊紀時代的這次溫度巨變中，似乎全都滅絕了。
• The assembled family tree shows that lice started to radiate into new species well before the end of the Cretaceous period, Dr. Smith and his colleagues report in the current issue of Biology Letters.
  史密斯博士和他同事在《生物學(xué)快報》上發(fā)文指出，建立起的系統(tǒng)樹表明在白堊紀末期之前虱子早就開始進化出不同的新物種。

原聲例句

• These creatures lived more than sixty-five million years ago, during Earth's late Cretaceous period.
• Scientists say it formed when high sea levels flooded the middle of North America, splitting the continent in two for millions of years during the late Cretaceous period.
• The Tyrannosaurus lived in North America during the late Cretaceous Period.

權(quán)威例句

• My piece is set in the late Cretaceous period, 65 million years ago (give or take a few).
  FORBES: Prototyping The Distant Future

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詞組短語

短語

• cretaceous s period 白堊紀
• carboniferous -cretaceous period 石炭紀白堊紀
• lower cretaceous period 下白堊統(tǒng)
• cretaceous period basins 白堊紀盆地
• the Cretaceous period 白堊紀;白堊紀時期

• cretaceous period更多詞組

專業(yè)釋義

地球科學(xué)

• 白堊紀