The polio vaccine has saved millions of lives.

脊髓灰疫苗挽救了数百万计的生命。

Children have been routinely immunized against polio since 1958.

自从1958 年来，童都按照常规接种防治麻痹症的疫苗。

She was struck down by polio at the age of four.

她四岁那年因麻痺症死去。

The polio vaccine has saved millions of lives.

脊髓灰炎苗挽救了数以百万计的生命。

Children have been routinely immunized against polio since 1958.

自从1958 年以来，按照常规接种防治小麻痹症的苗。

She was struck down by polio at the age of four.

她四岁那年因小麻痺症死去。

The polio vaccine has saved millions of lives.

脊髓灰炎疫苗挽救了数以百万计的生命。

Children have been routinely immunized against polio since 1958.

自从1958 年以来，童都按照常规接种防治麻痹症的疫苗。

She was struck down by polio at the age of four.

她四岁那年麻痺症死去。

The polio vaccine has saved millions of lives.

脊髓灰炎疫苗挽救了数以百万计的生命。

Children have been routinely immunized against polio since 1958.

自从1958 年以来，童都按照常规接种防治麻痹症的疫苗。

She was struck down by polio at the age of four.

她四岁那年麻痺症死去。

The polio vaccine has saved millions of lives.

挽救了数以百万计的生命。

Children have been routinely immunized against polio since 1958.

自从1958 年以来，儿童都按照常规接种防治小儿麻痹症的。

She was struck down by polio at the age of four.

她四岁那年因小儿麻痺症死去。

The polio vaccine has saved millions of lives.

脊髓灰炎疫苗挽救了数以百万计的生命。

Children have been routinely immunized against polio since 1958.

自从1958 年以来，儿童都按照常规接种防治小儿的疫苗。

She was struck down by polio at the age of four.

她四岁那年因小儿痺死去。

The polio vaccine has saved millions of lives.

脊髓灰炎疫苗挽救了数以百万计的生命。

Children have been routinely immunized against polio since 1958.

自从1958 年以来，儿童都按照常规接种防治小儿痹的疫苗。

She was struck down by polio at the age of four.

她四岁那年因小儿死去。

The polio vaccine has saved millions of lives.

脊髓灰炎疫挽救了数以百万计的生命。

Children have been routinely immunized against polio since 1958.

自从1958 年以来，儿童都按照常规接种防治小儿麻痹症的疫。

She was struck down by polio at the age of four.

岁那年因小儿麻痺症死去。

The polio vaccine has saved millions of lives.

脊髓灰炎疫苗挽救了数百万计的生命。

Children have been routinely immunized against polio since 1958.

自从1958 年来，童都按照常规接种防治痹症的疫苗。

She was struck down by polio at the age of four.

她四岁那年因痺症死去。