gum

1. N-MASS Gum is a substance, usually tasting of mint, which you chew for a long time but do not swallow. 口香糖

I do not chew gum in public. 我不在公共場郃嚼口香糖。

2. N-COUNT Your gums are the areas of firm, pink flesh inside your mouth, which your teeth grow out of. 齒齦

The toothbrush gently removes plaque without damaging the gums or causing bleeding. 牙刷輕輕地刷去齒菌斑，沒有傷及牙牀或引起出血。

3. N-MASS any of various sticky substances that exude from certain plants, hardening on exposure to air and dissolving or forming viscous masses in water 樹膠

4. V to stick together or in place with gum 用樹膠粘