He was a tubby little man in his fifties, with sparse hair.他50来岁，头发稀疏，身材矮胖。Many slopes are rock fields with sparse vegetation.许多山坡都是石头地，植被稀疏。The sparse line of spectators noticed nothing unusual.那一排稀稀落落的观众没留意到任何不寻常之处。...
In this paper , the uniquely functionalized antifoulant acrylamide monomers derived are designed and synthesized.分别以含辣素衍生结构的丙烯酰胺为防污剂、以含辣素衍生结构的丙烯酸树脂为成膜物质制备两类防污涂料....
a premise that allow of only one conclusion假设容许只有一个结论I disagree with the premise that economic development has priority over the environment.我不赞成经济发展应优先于环境保护这个前提。Electrification of the countryside is the premise of agric...