1. 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。
2. 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。
3. Buy lots of chewing gums or lollipops. 买一大堆口香糖或棒棒糖。
4. One of the most recent applications of gums is in film forming. 齿龈的最新应用之一是成膜。
5. The property of polysaccharide gums in Gleditsia sinensis Lam is studied. 对皂荚的多糖胶性质进行了研究。