He had all the window frames in the room remade.他把房间里所有的窗框都翻新了。The frames are secured by horizontal rails to the back wall.框架用横杆牢牢固定在后墙上。He did not pot a ball for the next two frames.他在接下来的两局中一杆未进。...
Objective To study the immunity duration of attenuated live rubella vaccine.目的了解冻干风疹减毒活疫苗的免疫持久性....round arches and attenuated columns.圆拱门和细长石柱Objective : To analyze the efficiency of delivery for CD 8 + T cell epitope b...