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。
随便看	external environment external environmental condition external environmental variation external environment condition external enzyme external epicondyle external epicondyle of femur external epicondyle of humerus external epigastric artery external equalizer external equalizer pipe external equilibrium external equipment external equity external equivalence external error external eruption external escape stairway external esophagostomy external ethmoidectomy external evaluation external event external event detection module external event module external event port