SCIENCE STUDY
Explaining the science of the ‘magical’ mugs
Do you know about “magical” mugs (马克杯)? When you fill one with hot water, its color changes or you see a pattern on the mug that wasn’t there before.
- 对本期电子报订户、有效期内的VIP教师会员和本学期高二尊享卡用户，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。
