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