The toothbrush gently removes plaque without damaging the gums or causing bleeding.

牙刷轻轻地刷去齿菌斑，没有伤及牙床或引起出血。

《柯林斯英汉双解大词典》

The bacteria in plaque make poisons that attack the gums.

牙菌斑中的细菌会产生损伤牙龈的毒素。

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In Europe, it was found that wild boar hair was too stiff and made the gums bleed, so horsehair, which was softer, was used instead.

在欧洲，人们发现野猪毛太硬，会使牙龈流血，所以就改用了更为柔软的马毛。

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An impacted wisdom tooth is one that fails to completely rise through the gums -- the term is erupt.

VOA: special.2011.08.10

Now, if you were listing the parts of the body, you would list the teeth, you would list the lips, you would list the gums, you would list the tongue, but you wouldn't list the smile.

如果要罗列完成这个动作牵涉到的身体部位,你也许会列举牙齿,嘴唇,你会列举牙龈,舌头,但你不会列举出笑

耶鲁公开课 - 死亡课程节选

And that allows the dentist to improve your gums, which avoids more pain down the road.

从而允许牙医治疗你的牙周炎，避免以后越来越痛。

耶鲁公开课 - 死亡课程节选

They can be found anywhere on the skin or even on the gums of the mouth.

CNN: What causes pyogenic granuloma?

"We can definitely tell by taking measurements under the gums each visit, " Dr. Weisz says.

WSJ: When Patients Lie to the Doctor

Mr. ONN: And within a couple of weeks I got most of the gums back.

NPR: Philadelphia's Gum Tree Cut Down