我的许多牙齿的牙龈边缘变得十分敏感。

Many of my teeth have become very sensitive at the gumline.

youdao

它不应该混淆的宽度角化牙龈，因为后者还包括牙龈边缘。

It should not be confused with the width of the keratinized gingiva because the latter also includes the marginal gingiva.

youdao

像边缘锋利而且太硬的刷毛会损害牙齿和牙龈，而天然的刷毛又多孔会滋生细菌。

Stiff bristles with sharp edges can damage teeth and gums, while natural bristles are porous and can harbor bacteria.

youdao