Science

No more of those scratchy phone screens

作者：AGENCIES

THOSE colour LCD (liquid crystal display) screens on cellphones and PDAs can get badly scratched from being kept in pockets stuffed with loose coins and keys. And CDs and DVDs can become unplayabl...

点击阅读全文

对本期电子报订户、有效期内的VIP教师会员和本学期二十一世纪英文报尊享卡用户，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。