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。

youdao

But nearly 100 million years ago relatives of modern snakes undulated through Cretaceous period waters aided by a paddlelike tail and dragging a pair of short, footless hind legs.

但是在将近1亿年前，现代蛇类的近亲们靠着它们船桨似的尾巴在白垩纪的水流里随波起伏，拖曳着它们短小而笨拙的后腿。

youdao

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。

youdao

These creatures lived more than sixty-five million years ago, during Earth's late Cretaceous period.

VOA: special.2010.10.05

My piece is set in the late Cretaceous period, 65 million years ago (give or take a few).

FORBES: Prototyping The Distant Future

Besides bringing new species to the textbooks - and relegating them immediately to the "extinct" category - the study sheds new light on the extinction event, widely thought to have been caused by an enormous asteroid impact at the end of the Cretaceous period, about 65.5 million years ago.

BBC: Obama-named lizard was wiped out with the dinosaurs

About 70 million years ago, during the Cretaceous period, Lenny and a bunch of friends snuck out of the house to go tip over some Hadrosaurs that were grazing in a field in modern-day Mongolia.

FORBES: US Attorney Preet Bharara Disregards Statutes of Limitation in 70 Million Year Pursuit Of Stolen Tyrannosaurus