如果你拥有一种特效药，你必须能服务很多的病人。

If you have a blockbuster drug, you have to treat a lot of patients.

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这是一种治疗癌症的特效药。

This is a specific for cancer.

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英国医生爱德华·詹纳放弃寻找特效药，靠找到一种预防天花的办法征服了这一疾病。

Edward Jenner, a British physician, abandoned the quest for a cure and conquered the disease by finding a way to prevent it.

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