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Do You Brush Your Teeth Properly?你真的會刷牙嗎？

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Brushing your teeth effectively lowers your chances of getting a number of chronic diseases， as well as keeping your teeth and gums healthy. But the majority of us are doing it wrong.

有效刷牙可以降低患上各種慢性疾病的風(fēng)險，同時也能保持牙齒和牙齦的健康。（剩余3448字）

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