immunize GRE专八

1.Parents are advised to have their children immunized against diphtheria.

建家长让孩子接种抗白喉疫苗。

2.Its safety and efficacy were tested and used to immunize the lactational and gestational bovines.

分别免疫泌乳期和妊娠乳牛，收集免疫乳。

3.Vaccination immunizes people against smallpox.

种牛痘能使人免患天花。

4.Children have been routinely immunized against polio since 1958.

自从1958 年以来，儿童都按接种防治小儿麻痹症的疫苗。