The Greeks, and then the Romans, improved the recipes for toothpaste by adding abrasives such as crushed bones and oyster shells, which were used to clean debris from teeth.
先是希腊人，然后是罗马人，将牙膏的配方加以改进。他们添加了一些磨料如碎骨和牡蛎壳，用来清除牙齿上的污垢。
Later the bones help to keep your dogs teeth clean and white, and promote healthy gums.
而且的胸骨可以你们的狗狗的牙干净和白，是一个好好的健康香口胶。
The Greeks, and then the Romans, improved the recipes for toothpaste by adding abrasives such as crushed bones and oyster shells, which were used to clean debris from teeth.
他们添加了一些磨料如碎骨和牡蛎壳，用来清除牙齿上的污垢。
The Greeks, and then the Romans, improved the recipes for toothpaste by adding abrasives such as crushed bones and oyster shells, which were used to clean debris from teeth.
他们添加了一些磨料如碎骨和牡蛎壳，用来清除牙齿上的污垢。
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