I made a small invention with my brothers, and it was a little short of the last national competition This year we improved a wave to see if we can make a breakthrough[狗头][狗头][狗头]

我和兄弟们发明了欧宝直播app下载一个小发明，与上一次全国比赛相比还差一点 今年，我们掀起了一股浪潮，看看我们能否取得突破[狗头] [狗头] [狗头]