Now that patients are keeping their own teeth longer, they are becoming more aware of the appearance of their teeth.
现今每个人都希望能够保持牙齿永恒不朽，所以更会注重牙齿外观上及结构上的完整。
The proportion of elderly patients is increasing from year to year because people are keeping their teeth longer nowadays.
由于目前人们的牙齿寿命更长，因此老年患者的比例逐年增长。
The massive prehistoric sea reptile was longer than a humpback whale and had teeth the size of cucumbers, scientists say.
据科学家所说，这头史前的海洋爬行类比座头鲸还长，它的牙齿有黄瓜那么大。
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