例文
- There are more than 30 species of harmful bacteria like streptococcus mutans, streptococcus sanguis, actinomyces viscosus, lactobacillus and bacteriodes melanonengicus, to name a few, all sticking onto each tooth surface at any point in time.
- A number of types of bacteria, such as " Actinomyces viscosus " and " A . naeslundii ", live in the mouth, where they are part of a sticky substance called calculus ( also called tartar ).