牙科专家认为每两三个月应该换一次牙刷。
Dental experts say it's a good idea to replace your toothbrush every two to three months.
牙科专家建议软毛牙刷安全地清除牙菌斑。
Dental Professionals recommend a soft-bristled toothbrush to safely remove dental plaque.
如果这发生在你身上也不用窘迫，甚至牙科专家及教授也会有难闻的口臭。
And don't be embarrassed if it happens to you, he adds. Even professors of dentistry and experts in the field of bad breath sometimes have malodorous mouths.
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