英语词汇cretaceous period怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

简明释义

白垩纪：地质年代的一个时期，距今约1.45亿年至6,500万年前，是中生代的最后一个时期。在白垩纪，恐龙繁盛，同时也出现了许多其他种类的生物。

双语例句

1
Triassic is the oldest period of Mesozoic followed successively by Jurassic and Cretaceous Periods.
三叠纪是中生代中最老的一一个纪，然后依次为侏罗纪和白垩纪。
2
It is well known that modern aves lack dentition unlike their toothed ancestors of the Jurassic and cretaceous periods.
众所周知现代鸟类不长牙齿，而其侏罗纪和白垩纪的祖先则长有牙齿。
3
It is well known that modern Aves lack dentition, unlike their toothed ancestors of the Jurassic and cretaceous periods.
众所周知现代鸟类不长牙齿，而其侏罗纪和白垩纪的祖先则长有牙齿。

单词	cretaceous period
释义	cretaceous period 简明释义白垩纪：地质年代的一个时期，距今约1.45亿年至6,500万年前，是中生代的最后一个时期。在白垩纪，恐龙繁盛，同时也出现了许多其他种类的生物。网络释义短语 1 late cretaceous-tertiary periods 晚白垩第三纪双语例句 1 Triassic is the oldest period of Mesozoic followed successively by Jurassic and Cretaceous Periods. 三叠纪是中生代中最老的一一个纪，然后依次为侏罗纪和白垩纪。 2 It is well known that modern aves lack dentition unlike their toothed ancestors of the Jurassic and cretaceous periods. 众所周知现代鸟类不长牙齿，而其侏罗纪和白垩纪的祖先则长有牙齿。 3 It is well known that modern Aves lack dentition, unlike their toothed ancestors of the Jurassic and cretaceous periods. 众所周知现代鸟类不长牙齿，而其侏罗纪和白垩纪的祖先则长有牙齿。
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