The polio vaccine has saved millions of lives.
脊髓灰
炎
苗挽救了数以百万计的生命。
炎,
麻痹症
苗;
;苗;The polio vaccine has saved millions of lives.
脊髓灰炎苗挽救了数以百万计的生命。
She was struck down by polio at the age of four.
她四岁那年
麻痺症死去。
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苗。
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