口腔卫生专业学习如何护理牙齿和牙龈，以及教别人相关口腔卫生的知识。
If you study dental hygiene, you'll learn how to care for teeth and gums and how to educate others about oral hygiene.
如果你平时不太注意口腔卫生请增加专业清洁次数。
Step up the professional cleaning schedule if you know you tend to be lax about home care.
如果你平时不太注意口腔卫生请增加专业清洁次数。
Step up the professional cleaning schedule if you know you tend to be lax about home care.
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