白垩世 bái'èshì Cretaceous Definitions Defs Origin Strokes Stroke Words Sentences Sents 白垩世 白堊世 bái'èshì Cretaceous Cretaceous, the geological period between approximately 145 and 66 million years ago
白垩世 白堊世 bái'èshì Cretaceous Cretaceous, the geological period between approximately 145 and 66 million years ago
