SUPER SCIENCE

Cool inventions

作者：teens

This pair of wheels help you move fast. Just wear them on your feet. Ready, go! They move as fast as you can run. When fully charged (充满电), they can run for about 30 minutes. Do you want a pair?

点击阅读全文

对本期电子报订户、有效期内的VIP教师会员和本学期小学尊享卡用户，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。