The Week
Number in the news
30 minutes
GERMAN scientists advise (建议) people to wait for 30 minutes to brush their teeth after drinking a soda or fruit juice.
They say the drinks have something sour in them that makes teeth fragile (脆弱的). If we brush our teeth right after drinking, it will hurt our teeth.
- 对本期电子报订户、有效期内的VIP教师会员和本学期初二尊享卡用户，我们开放所有内容：
- 如果您拥有以上权限，请点这里登录；
- 订阅电子报，请点这里；
- 激活VIP教师卡，请点这里；
- 激活21英语尊享卡，请点这里。
