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。
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。
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。
In Australia, this happened about 60 million years ago in the Cretaceous Period.
在澳洲，约60万多年前发生在白垩纪。
The prehistoric reptile lived in the Cretaceous period, about 125 million years ago.
这只史前爬行动物生活在约一亿两千五百万年前的白垩纪。
Tyrannosaurus rex arose during the Cretaceous period about 85 million years ago and thrived as a top land predator until the dinosaurs went extinct 20 million years later.
霸王龙出现，在白垩纪时期约85万年前，和蓬勃发展作为最高的土地捕食，直到恐龙灭绝二千万年后。
Pteranodons lived 60 million years ago. That time was called the late Cretaceous period.
无齿翼龙生活在6000万年前，这个时候是白垩纪晚期。
The Cretaceous Period was about 120 million years ago.
白垩纪时代大约是一千二百万年以前。
The Cretaceous Period was about 120 million years ago.
白垩纪时代大约是一千二百万年以前。
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