例句與造句

1. These accessory nuclei possess no separate ossific centers, but are invaded by the surrounding membrane bone and undergo absorption.
2. The inner alveolar border, usually described as arising from a separate ossific center ( " splenial center " ), is formed in the human mandible by an ingrowth from the main mass of the bone.
3. It's difficult to find ossific centers in a sentence. 用ossific centers造句挺難的