NEWSDESK

World’s biggest water gun

作者：TEENS

世界上最大的水枪，威力惊人。

Mark Rober was a NASA engineer (工程师) years ago. He likes to think big. One day, he decided to make a water gun (水枪). After he finished it, he learned that it was the largest one in the world.

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。