Fun Findings

Eat safer in summer with this new tool

作者：21ST

让夏日食品远离健康忧患

SUMMER is here. But with the hot weather, food goes bad quickly.

It could be very useful to know whether your food has gone bad. In April, scientists from Germany developed a film (薄膜). The film changes color to show

点击阅读全文

对本期电子报订户、有效期内的VIP教师会员和本学期初一尊享卡用户，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。