____
一民企老板蔡企胜自己花200万元,用5年时间潜心研制“吸毒船”。这套环保装置被投用到当地几条污染严重的河流,并获得国家发明专利。下列对专利认识正确的是( )
When he was running after his brother, the boy lost his ___ and had a bad fall.
缩写句子。
林子里响起了一片滴滴答答的滴水声。