There are two rows of soft gum stimulators, positioned on either side of the brush head that massage the gums.

它有两排刺激牙床的软刷，在刷头的两旁为你的牙床做按摩。

youdao

There are two rows of soft gum stimulators, positioned on either side of the brush head that massage the gums.

它有两排刺激牙床的软刷，在刷头的两旁为你的牙床做按摩。

youdao