顾说：“那时候，预防脊髓灰质炎的唯一办法就是发明疫苗。”
"At that time the only way to prevent polio was to invent a vaccine," said Gu.
“如果我们都不相信自己创造的东西，别人怎么能相信呢？”顾说。
"If we don't believe in what we produce, how can others believe in it?" said Gu.
顾说：“我们心满意足。我可以告诉人们，我已经尽力了，你们的孩子不会再得小儿麻痹症了。”
"We feel satisfied. I can tell people that I tried my best, and your kids will no longer get polio," said Gu.
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