The polio vaccine has saved millions of lives.
脊髓灰
炎
苗挽救了数以百万计
生命。
炎,小儿
痹
;
苗;苗;The polio vaccine has saved millions of lives.
脊髓灰炎苗挽救了数以百万计生命。
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
苗。
She was struck down by polio at the age of four.
她四岁那年因小儿痺死去。
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