来自《耶鲁大学开放课程：生物医学工程探索 第10集 第10集》

• 
  
  This was an early example of recombinant DNA technology
  这是早期使用DNA重组技术
• 
  
  being translated into a clinical product
  构建临床产品的案例
• 
  
  and that's the vaccine that's widely used in practice now.
  如今这种疫苗在实践中广泛使用
• 
  
  Another approach which is still investigational,
  另一种方法目前仍处于试验阶段
• 
  
  in that it's being tried for many diseases
  该方法即将试用于许多疾病
• 
  
  but not yet clinically used in any particular one,
  但还没有对某一特定疾病进行临床试验
• 
  
  is maybe you don't need to introduce a whole virus
  那就是无需引入整个病毒
• 
  
  or pieces of a protein at all.
  或者根本不用引入蛋白质片段
• 
  
  What if you took,
  如果你
• 
  
  instead of using--instead of going through the step of
  不用...不用提取
• 
  
  isolating the gene for Hepatitis B,
  乙型肝炎的基因
• 
  
  cloning that into a plasmid,
  不用将其克隆为质粒