杰奎琳临产困难, 康复很慢.The birth was difficult, and Jacqueline was making a slow recovery.很多临产妇女由于孕妇过多而被妇产医院拒之门外.Many expectant mothers were crowded out of the maternity hospitals.现在是临产的前驱期.You are now in the preliminary stage of...
钡以重晶石形态 ( 硫酸钡 ) 在工业上用作油漆的白色涂料.Barium as barite ( barium sulfate ) is used industrially as a white pigment for paint.硫酸钡必须是无块的粉末.The barium sulfate must be a lump - free powder.EDTMPS对硫酸钙、硫酸钡垢的阻垢效果好.EDTMPS shows better an...