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systematic vaccination造句

"systematic vaccination"是什么意思   

例句與造句

  1. Volunteers must already have received a vaccine decades ago, before France stopped systematic vaccinations.
  2. Mattei also said France has ruled out systematic vaccination of the population out of concerns the vaccine can occasionally be deadly or cause serious side effects.
  3. Faced with fears of a potential public health disaster, France has suspended systematic vaccinations of school children against Hepatitis B, four years after starting the mass immunization program.
  4. Health officials blamed a lack of resources in Central African Republic, one of the world's poorest countries, saying there had been no systematic vaccination for the disease since 1992.
  5. It's difficult to find systematic vaccination in a sentence. 用systematic vaccination造句挺難的

相鄰詞匯

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