cretaceous [krɪ'teɪʃəs]

单词级别

附加级

基本释义

adj. 白垩的，白垩纪的 n. 白垩纪，白垩系

参考例句

Only in the tropics were numerous late Cretaceous groups extinguished during peaks in their evolution. 只是热带地区才有大批晚白垩纪生物类群正值其演化的极盛时期突然消亡。
The Cretaceous extinction was like a terrible streak of bad luck lasting millions of years. 白垩纪的生物绝灭，犹如一场持续千百万年的可怕厄运。

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