回想当初，这群苗民都是战士——一项由中情局支持、长达15年的美国保密行动的秘密战士。

Back then, the Hmong were fighters—secret fighters in a 15-year covert US operation backed by the CIA.

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方法采用整群抽查的方法，调查32个预防接种点和整合后22个预防接种点0 ~ 4儿童“六苗”接种率情况。

METHODS Used cluster sampling 32 vaccination points and combined 22 points investigation vaccination of children aged 0 to 4, "the six vaccine" vaccination rates.

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急性毒性试验表明所制备的灭活苗接种1日龄雏鸡24天后未发现鸡群有异常表现，所制备疫苗是安全的。

That acute toxicity tests showed that the chicken group normally until 24 days old by inoculated the inactivated oil-emulsion vaccines at 1-day-old, indicated the vaccine is safe.

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