Good oral hygiene and regular dental care are important, whatever your age.

无论年龄大小，良好的口腔卫生和定期的牙齿保健都非常重要。

《柯林斯英汉双解大词典》

To keep gums healthy, practice good oral hygiene.

想保持牙龈健康，就需要良好的牙龈卫生。

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Helping patients learn good oral hygiene is the job of the dental hygienist.

帮助病人学习口腔卫生室洗牙师的工作。

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You'll need to practice good oral hygiene for life, however, so your gum problems don't return.

CNN: Gingivitis

Gingivitis usually clears up after a thorough professional cleaning as long as you continue to follow a program of good oral hygiene at home.

CNN: Gingivitis

Good written and oral communication skills.

UNESCO: Criteria & Requirements