常见例句用作名詞 (n.)The root is covered with a hard material called cementum.牙根上覆蓋著的堅硬材料叫作牙骨質。These findings may contribute to the development of a periodontal treatment that includes cementum regeneration.這些結果可以有助於牙周治療的發展，包括牙骨質的再生。 返回 cementum