Gingivitis comes from bacteria that get into the softgum tissue and infect it.
细菌侵入牙齿周围软组织并使其感染后造成牙龈炎。
2
There are two rows of softgum 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。
3
In addition to selling green tea leaves, tea merchants have distilled the brew's essence and added it to gum, soft drinks and skin creams - even, in Asia, to Kit Kat candy bars.