These animals were not as sensitive to climate changes in the Cretaceous period as they are today.

这些动物在白垩纪对气候变化不像今天这样敏感。

youdao

Changes in climate before the Cretaceous period caused severe fluctuation in sea level, resulting in the extinction of the dinosaurs.

白垩纪以前的气候变化导致了海平面的剧烈波动，引发了恐龙的灭绝。

youdao

Not exactly outer space then, or the Cretaceous period.

而并不是外太空或是白垩纪。

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

VOA: special.2010.10.05

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.

VOA: special.2010.10.05

The Tyrannosaurus lived in North America during the late Cretaceous Period.

VOA: special.2009.09.01

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

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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

The moment most people were persuaded that the dinosaurs were killed by an impact was when the crater in Mexico was shown to have been created 65m years ago, at the end of the Cretaceous period.

ECONOMIST: Some new ideas about why life on Earth has periodic crises