英语语法分析

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》

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。

Buy lots of chewing gums or lollipops.

买一大堆口香糖或棒棒糖。