牙形成

Hertwig's epithelial root sheath degenerates immediately after root dentin is formed.

上皮根鞘在根部牙本质形成后迅速蜕变。

Nowadays, Yuehu Peninsula nearby the head of No.1 Han River Bridge, a small lake in the east has been connected with the big one forming a whole Zhiyin Island, there are several long and quiet meanderings which connect with some recreation plaza including Serial Bells Plaza, the just stationed figures of serial bells, stainless steel ancient Qin and piano as well as magic laser instrument which can be played by fingers are presenting the theme that Boya and Ziqi met each other and became bosom friends.

如今，靠近江汉一桥桥头的月湖半岛，东侧的小湖已经与大湖融通，形成了知音全岛，岛上多条悠长的通幽曲径，连接编钟广场等休闲主题小广场，刚刚落户的编磬雕像，不锈钢的古琴、钢琴，以及可以用手指弹奏奇妙的激光琴，无不凸显伯牙、子期的相遇相知的知音主题。

After a tooth is extracted, due to the lack of occlusive stimulation, the absorption of the remains of alveolar ridge shows an irreversible process, due to the imbalance of the bone formation.

牙齿拔除后，由于缺乏正常咬合力的生理性刺激，剩余牙槽嵴的吸收表现为一个持续、不可逆的过程，这是由于骨形成与吸收的不平衡造成的。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。