Culture and Discovery
Germ cloud follows us around
HAVE you ever used your feet to flush (放水冲) toilet? Half of Americans do this, according to the chart on the left.
What worries them is germs (细菌).
- 对本期电子报订户、有效期内的VIP教师会员和本学期高一尊享卡用户，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。
