在巴西脊髓灰质炎实际上已经根除。Polio has been virtually eradicated in Brazil.脊髓灰质炎疫苗挽救了数以百万计的生命.The polio vaccine has saved millions of lives.1995年,已消灭脊髓灰质炎.By 1995 poliomyelitis had been totally eliminated....
Ag, don't worry about it.哦，别担心。They recommend this method as a measurement for determination of Ag dispersions.他们推荐这种方法做为测定银分散度的方法.The interlinked occurrente of positiveanomalies of Au, Ag, W, ect. and negative anom...