immunize GRE专八四级六级

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

分免泌乳期和妊娠乳牛，收集免乳。

Parents are advised to have their children immunized against diphtheria.

建议家长让孩子接抗白喉。

Vaccination immunizes people against smallpox.

牛痘能使人免患天花。

Children have been routinely immunized against polio since 1958.

自从1958 年以来，儿童都按照常规接防治小儿麻痹症的。