cretaceous

cretaceous的英语例句

1. Liupanshan Cretaceous basin is a mono - basin of Liupanshan inland overlapping basin.

   六盘山白垩纪盆地是六盘山内陆叠合盆地的一个单型盆地.

2. 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.

3. 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.