Culture and DIscovery

New way to fight the fire threat

作者：21ST

AS well as lighting up bulbs, electricity can also put out fires. Scientists from Harvard University said that they had been able to put out a flame (火焰) more than one foot high (about 30.48cm) using an electric wand (棍、棒).

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。